For abort() declaration.

--- image/misc.c.orig	Thu Nov 20 01:06:46 2014
+++ image/misc.c	Thu Nov 20 01:06:59 2014
@@ -12,6 +12,7 @@
 #include "xloadimage.h"
 #include "patchlevel"
 #include <signal.h>
+#include <stdlib.h>
 
 extern int      _Xdebug;
 extern Display *display;