On some platforms, certain headers need to be included before regex.h

Happily, these are already included in cache.h, which is included anyway...
so: change the order of includes.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diffcore-pickaxe.c

@@ -1,12 +1,12 @@
 /*
  * Copyright (C) 2005 Junio C Hamano
  */
-#include <regex.h>
-
 #include "cache.h"
 #include "diff.h"
 #include "diffcore.h"
 
+#include <regex.h>
+
 static unsigned int contains(struct diff_filespec *one,
 			     const char *needle, unsigned long len,
 			     regex_t *regexp)