Bug 783166 - Script-Fu color selector crashes

libgimpwidgets now needs an initialized babl if color selectors are
used, call babl_init() in gimp_widgets_init(). It can be safely called
redundantly.

libgimpwidgets/gimpwidgets-private.c

@@ -21,6 +21,7 @@
 
 #include "config.h"
 
+#include <babl/babl.h>
 #include <gtk/gtk.h>
 
 #include "libgimpbase/gimpbase.h"
@@ -74,6 +75,8 @@ gimp_widgets_init (GimpHelpFunc          standard_help_func,
   _gimp_get_background_func = get_background_func;
   _gimp_ensure_modules_func = ensure_modules_func;
 
+  babl_init (); /* color selectors use babl */
+
   gimp_icons_init ();
 
   gtk_window_set_default_icon_name (GIMP_ICON_WILBER);