Fixed compiler warning for potentially undefined return value

Author: SaschaSchaefer

Designer/FCommands.pas

@@ -334,6 +334,8 @@ function TFrameCommands.FindSmallestUnusedID(const pMinId: Integer = 2): Integer
   finally
     lIDs.Free;
   end;
+
+  Exit(0);
 end;
 
 procedure TFrameCommands.BtnGenerateIDClick(Sender: TObject);