Reverts broken portion of old character pushback change.

This one instance of the 63 character-pushback changes in commit
fbaaaa76 broke the packet-regress test, though that was masked due to
another bug's causing that test to be disabled.  With this instance
reverted, the test passes again.

It's not entirely clear why a change within Zodiac-specific code broke
one SiRF test and two Evermore tests, but that's empirically the case.

This change affects one daemon regression test.  The ublox-8 test
begins with a $GPRMC sentence preceded by a bunch of garbage.  The
broken version of packet.c skips this sentence, while the fixed
version recognizes it.  The test data has been updated accordingly.

TESTED:
Manually ran the packet-regress test successfully.
Ran "scons build-all www check".

1 files changed, 1 insertions, 1 deletions

diff --git a/packet.c b/packet.c
index 924b1f85..bf0e2757 100644
--- a/packet.c
+++ b/packet.c
@@ -1104,7 +1104,7 @@ static bool nextstate(struct gps_lexer_t *lexer, unsigned char c)
 	if (c == 0x81)
 	    lexer->state = ZODIAC_LEADER_2;
 	else
-	    return character_pushback(lexer, GROUND_STATE);
+	    (void) character_pushback(lexer, GROUND_STATE);
 	break;
     case ZODIAC_LEADER_2:
 	lexer->state = ZODIAC_ID_1;