Simplify TSIP satellite-picture packet recognition.

Previuous versions allowed a data length of up to 27.  It's not
clear why, as the TSIP reference specifies a length of 25 and
that's all the driver can use.

All regression tests pass.

1 files changed, 1 insertions, 2 deletions

diff --git a/packet.c b/packet.c
index a62f76b5..27b78ab0 100644
--- a/packet.c
+++ b/packet.c
@@ -1723,8 +1723,7 @@ void packet_parse(struct gps_packet_t *lexer)
 		    /* pass */ ;
 		else if (TSIP_ID_AND_LENGTH(0x57, 8))
 		    /* pass */ ;
-		else if ((0x5a == pkt_id)
-			 && ((29 <= packetlen) && (31 >= packetlen)))
+		else if (TSIP_ID_AND_LENGTH(0x5a, 25))
 		    /* pass */ ;
 		else if (TSIP_ID_AND_LENGTH(0x5b, 16))
 		    /* pass */ ;