builtin/repack.c: assign pack split later

To determine the where to place the split when repacking with the
'--geometric' option, split_pack_geometry() assigns the "split" variable
and then decrements it in a loop.

It would be equivalent (and more readable) to assign the split to the
loop position after exiting the loop, so do that instead.

Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/repack.c

@@ -356,8 +356,6 @@ static void split_pack_geometry(struct pack_geometry *geometry, int factor)
 		return;
 	}
 
-	split = geometry->pack_nr - 1;
-
 	/*
 	 * First, count the number of packs (in descending order of size) which
 	 * already form a geometric progression.
@@ -365,12 +363,12 @@ static void split_pack_geometry(struct pack_geometry *geometry, int factor)
 	for (i = geometry->pack_nr - 1; i > 0; i--) {
 		struct packed_git *ours = geometry->pack[i];
 		struct packed_git *prev = geometry->pack[i - 1];
-		if (geometry_pack_weight(ours) >= factor * geometry_pack_weight(prev))
-			split--;
-		else
+		if (geometry_pack_weight(ours) < factor * geometry_pack_weight(prev))
 			break;
 	}
 
+	split = i;
+
 	if (split) {
 		/*
 		 * Move the split one to the right, since the top element in the