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-rw-r--r--FL/platform.H2
1 files changed, 1 insertions, 1 deletions
diff --git a/FL/platform.H b/FL/platform.H
index fbabca2fb..7dfa4a186 100644
--- a/FL/platform.H
+++ b/FL/platform.H
@@ -57,7 +57,7 @@ public:
Fl_X *next;
// static variables, static functions and member functions
static Fl_X* first;
- static Fl_X* i(const Fl_Window* w) {return (Fl_X*)w->i;}
+ static Fl_X* i(const Fl_Window* w) {return w ? (Fl_X*)w->i : 0;}
# if defined(FLTK_USE_X11) && FLTK_USE_X11 // for backward compatibility
static void make_xid(Fl_Window*, XVisualInfo* =fl_visual, Colormap=fl_colormap);
static Fl_X* set_xid(Fl_Window*, Window);