jvcllaz: Make sure that "Maximize compatibility" is checked in each package. Less hints and warnings.

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@8071 8e941d3f-bd1b-0410-a28a-d453659cc2b4

components/jvcllaz/run/JvPascalInterpreter/JvInterpreterFm.pas

@@ -620,6 +620,7 @@ var
   UnitName: string;
   S: string = '';
 begin
+  Result := Default(Variant);
   FFileName := FileName;
   try
     UnitName := ChangeFileExt(ExtractFileName(FFileName), '');