fix bug where timezones not observing DST were incorrectly translated

Timezones like Pacific/Honolulu and America/Phoenix (and probably others) do not observe DST.  They always stay on their standard time.

The previous code essentially treated all calls to `tzTime` in this time zone like the timestamp `t` was a UTC timestamp (subtracting the the offset).  However, this is incorrect and should be able to translate both ways depending on what `local_or_utc` is set to.

src/ezTime.cpp

@@ -749,9 +749,7 @@ time_t Timezone::tzTime(time_t t, ezLocalOrUTC_t local_or_utc, String &tzname, b
 		if (tzname == "UTC" && std_offset) tzname = "???";
 		is_dst = false;
 		offset = std_offset;
-		return t - std_offset * 60;
+	} else {
-	}
-
 	int16_t dst_offset = std_offset - dst_shift_hr * 60 - dst_shift_min;
 	// to find the year
 	tmElements_t tm;
@@ -778,6 +776,7 @@ time_t Timezone::tzTime(time_t t, ezLocalOrUTC_t local_or_utc, String &tzname, b
 	} else {
 		offset = std_offset;
 	}
+	}
 
 	if (local_or_utc == LOCAL_TIME) {
 		return t + offset * 60LL;