wrong header file

src/gps/GPS.h

@@ -137,7 +137,7 @@ class GPS : private concurrency::OSThread
 
     GpsOperation getGpsOp() const;
 
-    bool getACK(uint8_t cl, uint8_t id);
+    bool getACK(uint8_t c, uint8_t i);
 
     /**
      * Tell users we have new GPS readings