[Github-comments] [geany/geany] Nasty messages from splitwindow plugin (#993)

[Colomban Wendling]

See https://github.com/geany/geany/pull/1272#issuecomment-255576509

@codebrainz actually your proposed fix is almost correct, but the `GTK_IS_WIDGET()` part is unnecessary -- and suggests it might be something else.  The problem is simply that the scrollbars will be `NULL` if `Dispose()` has already run, which will happen if destroying a still displayed widget (I think it's as easy as that, but I didn't triple check).

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