[platform-swt-dev] possible gtk-linux bug?

["Frank Benoit" <keinfarbton@xxxxxxxxxxxxxx>]

I am working on a SWT port to another language, and i got an GTK assertion, triggered by that code:

http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt/Eclipse%20SWT/gtk/org/eclipse/swt/widgets/Shell.java?annotate=1.274

1989 :     int /*long*/ window = OS.gdk_window_at_pointer (x, y);
1990 :     int /*long*/ [] user_data = new int /*long*/ [1];
1991 :     OS.gdk_window_get_user_data (window, user_data);

Line 1989 can set the window to NULL and gdk_window_get_user_data prints then the assertion.
If i change the line 1991 to

1991 :     if( window != 0 ) OS.gdk_window_get_user_data (window, user_data);

the assertion goes away.
Is this now a bug fix, or did i miss something?

Frank