Fix build error in fcacebbfb1

The header was not included, define ulong locally.

source/creator/buildinfo.c

@@ -6,12 +6,12 @@
  * \ingroup creator
  */
 
-#include "BLI_sys_types.h"
-
 #ifdef WITH_BUILDINFO_HEADER
 #  include "buildinfo.h"
 #endif
 
+typedef unsigned long ulong;
+
 #ifdef BUILD_DATE
 
 extern char build_date[];