git-compat-util.h: don't define _XOPEN_SOURCE on cygwin

diff --git a/decorate.c b/decorate.c
index 7cb5d29a89a43ecf7e433db513b66184df3accb8..b2aac90c26296eacdd6c2cdb68a15f3744c595e9 100644 (file)
--- a/decorate.c
+++ b/decorate.c
@@ -8,10 +8,7 @@
 
 static unsigned int hash_obj(const struct object *obj, unsigned int n)
 {
-       unsigned int hash;
-
-       memcpy(&hash, obj->sha1, sizeof(unsigned int));
-       return hash % n;
+       return sha1hash(obj->sha1) % n;
 }
 
 static void *insert_decoration(struct decoration *n, const struct object *base, void *decoration)