Add single-include guard

diff --git a/gtk/gtkinfobar.h b/gtk/gtkinfobar.h
index cbc206a12076c9a44cfc6ccfeaa8fdf0d396b450..530ebfb9ceb1a3510678c79d236876f78f7deacc 100644 (file)
--- a/gtk/gtkinfobar.h
+++ b/gtk/gtkinfobar.h
@@ -28,6 +28,10 @@
  * Modified by the GTK+ Team, 2008-2009.
  */
 
+#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#error "Only <gtk/gtk.h> can be included directly."
+#endif
+
 #ifndef __GTK_INFO_BAR_H__
 #define __GTK_INFO_BAR_H__