patchGIT: fix compilation error in pack-redundant.c

diff --git a/pack-redundant.c b/pack-redundant.c
index fb6cb48..954dc55 100644
--- a/pack-redundant.c
+++ b/pack-redundant.c
@@ -376,11 +376,11 @@ size_t sizeof_union(struct packed_git *p
 size_t get_pack_redundancy(struct pack_list *pl)
 {
 	struct pack_list *subset;
+	size_t ret = 0;
 
 	if (pl == NULL)
 		return 0;
 
-	size_t ret = 0;
 	while ((subset = pl->next)) {
 		while(subset) {
 			ret += sizeof_union(pl->pack, subset->pack);