OpenSCAD: [skip ci] Coverity: Bad use of null-like value

src/Mod/OpenSCAD/importCSG.py

@@ -381,6 +381,7 @@ def CGALFeatureObj(name,children,arguments=[]):
 
 def p_offset_action(p):
     'offset_action : offset LPAREN keywordargument_list RPAREN OBRACE block_list EBRACE'
+    subobj=None
     if len(p[6]) == 0:
         newobj = placeholder('group',[],'{}')
     elif (len(p[6]) == 1 ): #single object

src/Mod/OpenSCAD/prototype.py

@@ -86,6 +86,7 @@ class Node:
         import FreeCAD,Part
         if not doc:
             doc=FreeCAD.newDocument()
+        obj=None
         namel=self.name.lower()
         multifeature={'union':"Part::MultiFuse",'imp_union':"Part::MultiFuse",
                       'intersection':"Part::MultiCommon"}