smart_protocol: fix parsing of server ACK responses

Fix ACK parsing in wait_while_ack() internal function. This patch
handles the case where multi_ack_detailed mode sends 'ready' ACKs. The
existing functionality would bail out too early, thus causing the
processing of the ensuing packfile to fail if/when 'ready' ACKs were
sent.

Author: RogerGee

src/transports/smart_protocol.c

@@ -325,7 +325,8 @@ static int wait_while_ack(gitno_buffer *buf)
 
 		if (pkt->type == GIT_PKT_ACK &&
 		    (pkt->status != GIT_ACK_CONTINUE &&
-		     pkt->status != GIT_ACK_COMMON)) {
+		     pkt->status != GIT_ACK_COMMON &&
+		     pkt->status != GIT_ACK_READY)) {
 			git__free(pkt);
 			return 0;
 		}