make python operator instances subclasses of the wmOperator when called.

was subclassing the operator's type before.

Removes the need for passing self.__operator__, can pass self directly.

release/scripts/io/export_fbx.py

@@ -3429,7 +3429,7 @@ class EXPORT_OT_fbx(bpy.types.Operator):
 	
 	def invoke(self, context, event):	
 		wm = context.manager
-		wm.add_fileselect(self.__operator__)
+		wm.add_fileselect(self)
 		return ('RUNNING_MODAL',)