fix tinySA build for 1.4090

Signed-off-by: Martin <Ho-Ro@users.noreply.github.com>

plot.c

@@ -588,9 +588,9 @@ static uint16_t get_trigger_level(
 #endif
     ){
   index_y_t trigger;
+#ifdef __BANDS__
   if (setting.trigger_trace != 255)
     setting.trigger_level = measured[setting.trigger_trace][x];
-#ifdef __BANDS__
   else if (setting.multi_band && !setting.multi_trace) {
     int b = getBand(x);
     setting.trigger_level = setting.bands[b].level;