Fix pylint crashing when using custom flags

Silly pylint

package.json

@@ -91,7 +91,7 @@
         "c9.ide.imgeditor": "#612e75ef4f",
         "c9.ide.immediate": "#a962119bec",
         "c9.ide.installer": "#0fde9f0067",
-        "c9.ide.language.python": "#eec6b33c70",
+        "c9.ide.language.python": "#fca9f80eda",
         "c9.ide.language.go": "#a023f576ae",
         "c9.ide.mount": "#9014f13dc5",
         "c9.ide.navigate": "#38ae100ea1",