Fix GTK_CRITICAL errors

[xonotic/netradiant.git] / libs / gtkutil / glwidget.cpp

diff --git a/libs/gtkutil/glwidget.cpp b/libs/gtkutil/glwidget.cpp
index 7ab8ebe6d43cbb73e29ca1d6d384b926bf747810..31f5bbdabf35cc9a64985d0a330ac34ef61ea741 100644 (file)
--- a/libs/gtkutil/glwidget.cpp
+++ b/libs/gtkutil/glwidget.cpp
@@ -98,6 +98,7 @@ bool glwidget_make_current(ui::GLArea self)
 
 void glwidget_swap_buffers(ui::GLArea self)
 {
+    g_assert(GTK_IS_GL_AREA(self));
     gtk_gl_area_queue_render(self);
 }