CAM: fix some non-refactored postprocessors crashing on blank lines

src/Mod/CAM/Path/Post/scripts/KineticNCBeamicon2_post.py

@@ -344,7 +344,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     outstring.pop(0)
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/centroid_post.py

@@ -282,7 +282,7 @@ def parse(pathobj):
             commandlist = []  # list of elements in the command, code and params.
             command = c.Name  # command M or G code or comment string
 
-            if command[0] == "(":
+            if command.startswith("("):
                 command = PostUtils.fcoms(command, COMMENT)
 
             commandlist.append(command)

src/Mod/CAM/Path/Post/scripts/dynapath_4060_post.py

@@ -401,7 +401,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     outstring.pop(0)
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/fablin_post.py

@@ -251,7 +251,7 @@ def parse(pathobj):
             command = c.Name
 
             # fablin does not support parenthesis syntax, so removing that (pocket) in the agnostic gcode
-            if command[0] == "(":
+            if command.startswith("("):
                 if not OUTPUT_COMMENTS:
                     pass
             else:

src/Mod/CAM/Path/Post/scripts/fangling_post.py

@@ -411,7 +411,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     outstring.pop(0)
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/fanuc_post.py

@@ -504,7 +504,7 @@ def parse(pathobj):
             if command == "G80" and lastcommand == nextcommand:
                 continue
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/jtech_post.py

@@ -313,7 +313,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     outstring.pop(0)
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/linuxcnc_post.py

@@ -355,7 +355,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     outstring.pop(0)
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/mach3_mach4_post.py

@@ -387,7 +387,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     outstring.pop(0)
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/opensbp_post.py

@@ -359,7 +359,7 @@ def parse(pathobj):
                 output += scommands[command](c)
                 if c.Parameters:
                     CurrentState.update(c.Parameters)
-            elif command[0] == "(":
+            elif command.startswith("("):
                 output += "' " + command + "\n"
             else:
                 print("I don't know what the hell the command: ", end="")

src/Mod/CAM/Path/Post/scripts/philips_post.py

@@ -412,7 +412,7 @@ def export(objectslist, filename, argstring):
                 command = command.replace("G0", "G")  # normalize: G01 -> G1
 
             if command != UNITS or UNITS_INCLUDED:
-                if command[0] == "(":
+                if command.startswith("("):
                     command = PostUtils.fcoms(command, COMMENT)
                 # the mapping is done for output only! For internal things we
                 # still use the old value.

src/Mod/CAM/Path/Post/scripts/uccnc_post.py

@@ -599,7 +599,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     commandlist.pop(0)
 
-            if c.Name[0] == "(" and not OUTPUT_COMMENTS:  # command is a comment
+            if c.Name.startswith("(") and not OUTPUT_COMMENTS:  # command is a comment
                 continue
 
             # Now add the remaining parameters in order

src/Mod/CAM/Path/Post/scripts/wedm_post.py

@@ -456,7 +456,7 @@ def parse(pathobj):
                 if command == lastcommand:
                     outstring.pop(0)
 
-            if command[0] == "(":  # command is a comment
+            if command.startswith("("):  # command is a comment
                 if OUTPUT_COMMENTS:  # Edit comment  with COMMENT_CHAR
                     outstring.insert(0, COMMENT_CHAR)
                 else: