fix memory leak in parse_object when check_sha1_signature fails
fix memory leak in parse_object when check_sha1_signature fails

When check_sha1_signature fails, program is not terminated:
it prints an error message and returns NULL, so the
buffer returned by read_sha1_file should be freed before.

Signed-off-by: Carlos Rica <056b659bb83a98be82f41418d2b5ccd3e64ee7a8@gmail.com>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git