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-rw-r--r--gtk/gtkstyle.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk/gtkstyle.c b/gtk/gtkstyle.c
index 0c00b3e30..3469c74cd 100644
--- a/gtk/gtkstyle.c
+++ b/gtk/gtkstyle.c
@@ -659,6 +659,7 @@ gtk_style_realize (GtkStyle *style,
GdkColormap *colormap)
{
g_return_if_fail (GTK_IS_STYLE (style));
+ g_return_if_fail (GDK_IS_COLORMAP (colormap));
style->colormap = gdk_colormap_ref (colormap);
style->depth = gdk_colormap_get_visual (colormap)->depth;