Decode SkytTraq undocumented $STI sentence.

Eric will gag at my abuse of the parser, but I'm not up to a
major resturcture today.

Not sure how to output the error in JSON.

1 files changed, 2 insertions, 0 deletions

diff --git a/packet.c b/packet.c
index d5c50bad..b1b90178 100644
--- a/packet.c
+++ b/packet.c
@@ -607,8 +607,10 @@ static bool nextstate(struct gps_lexer_t *lexer, unsigned char c)
     case SOUNDER_LEAD_1:
 	if (c == 'D')		/* Depth-sounder leader accepted */
 	    lexer->state = NMEA_LEADER_END;
+#ifdef SKYTRAQ_ENABLE
 	else if (c == 'T')		/* $ST leader accepted, to $STI */
 	    lexer->state = NMEA_LEADER_END;
+#endif /* SKYTRAQ_ENABLE */
 	else
 	    return character_pushback(lexer, GROUND_STATE);
 	break;