Merge pull request #455 from brodie/pack-fixes

odb_pack: don't do ambiguity checks for fully qualified SHA1 hashes

src/pack.c

@@ -722,7 +722,7 @@ static int pack_entry_find_offset(
 		}
 	}
 
-	if (found && pos + 1 < (int)p->num_objects) {
+	if (found && len != GIT_OID_HEXSZ && pos + 1 < (int)p->num_objects) {
 		/* Check for ambiguousity */
 		const unsigned char *next = current + stride;