Compilation fix

radio/src/lua/api_general.cpp

@@ -209,8 +209,9 @@ static void luaPushLatLon(lua_State* L, TelemetrySensor & telemetrySensor, Telem
   lua_pushtablenumber(L, "lon", telemetryItem.gps.longitude * 0.000001);
   lua_pushtablenumber(L, "pilot-lon", telemetryItem.pilotLongitude * 0.000001);
 
-  if (telemetryItem.hasReceiveTime())
-    lua_pushtableinteger(L, "delay", telemetryItem.getDelaySinceLastValue());
+  int8_t delay = telemetryItem.getDelaySinceLastValue();
+  if (delay >= 0)
+    lua_pushtableinteger(L, "delay", delay);
   else
     lua_pushtablenil(L, "delay");
 }

radio/src/telemetry/telemetry_sensors.h

@@ -103,6 +103,16 @@ class TelemetryItem
       return (timeout == TELEMETRY_SENSOR_TIMEOUT_OLD);
     }
 
+    inline bool hasReceiveTime()
+    {
+      return timeout >= 0;
+    }
+
+    inline int8_t getDelaySinceLastValue()
+    {
+      return hasReceiveTime() ? TELEMETRY_SENSOR_TIMEOUT_START - timeout : TELEMETRY_SENSOR_TIMEOUT_OLD;
+    }
+
     inline bool isFresh()
     {
       return TELEMETRY_SENSOR_TIMEOUT_START - timeout <= 1; // 2 * 160ms