Fixing 'red ink' bugs in CAM

fixes:  https://github.com/Ondsel-Development/FreeCAD/issues/93
fixes https://github.com/Ondsel-Development/FreeCAD/issues/87
fixes https://github.com/Ondsel-Development/FreeCAD/issues/88


fix threadmilling error if not proper tool
fix vcarve error if no proper tool
fix probe error if no proper tool
fix deburr error if no base geometry
Fix adaptive op error if no base geometry

src/Mod/CAM/Path/Op/PocketBase.py

@@ -104,6 +104,11 @@ class ObjectPocket(PathAreaOp.ObjectOp):
         Can safely be overwritten by subclass."""
         pass
 
+    def opExecute(self, obj):
+        if len(obj.Base) == 0:
+            return
+        super().opExecute(obj)
+
     def areaOpSetDefaultValues(self, obj, job):
         obj.PocketLastStepOver = 0