parse_object(): simplify blob conditional

Commit 8db2dad (parse_object(): check on-disk type of suspected blob,
2022-11-17) simplified the conditional for checking if we might have a
blob. But we can simplify it further. In:

  !obj || (obj && obj->type == OBJ_BLOB)

the short-circuit "OR" means "obj" will always be true on the right-hand
side. The compiler almost certainly optimized that out anyway, but
dropping it makes the conditional easier to understand for humans.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

object.c

@@ -286,7 +286,7 @@ struct object *parse_object_with_flags(struct repository *r,
 			return &commit->object;
 	}
 
-	if ((!obj || (obj && obj->type == OBJ_BLOB)) &&
+	if ((!obj || obj->type == OBJ_BLOB) &&
 	    oid_object_info(r, oid, NULL) == OBJ_BLOB) {
 		if (!skip_hash && stream_object_signature(r, repl) < 0) {
 			error(_("hash mismatch %s"), oid_to_hex(oid));