[gimp] app: #include <string.h> in GimpHighlightableButton

[N/A <ell src gnome org>]

commit b1266b2c3f032cfefe04b6c3735eaa56323e8b14
Author: Ell <ell_se yahoo com>
Date:   Wed Mar 7 09:52:47 2018 -0500

    app: #include <string.h> in GimpHighlightableButton
    
    Needed for memcmp().

 app/widgets/gimphighlightablebutton.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/app/widgets/gimphighlightablebutton.c b/app/widgets/gimphighlightablebutton.c
index d7ea8da..cb285d4 100644
--- a/app/widgets/gimphighlightablebutton.c
+++ b/app/widgets/gimphighlightablebutton.c
@@ -20,6 +20,8 @@
 
 #include "config.h"
 
+#include <string.h>
+
 #include <gegl.h>
 #include <gtk/gtk.h>