redefine hasLock() for UBlox GPS

src/gps/UBloxGPS.cpp

@@ -196,6 +196,11 @@ bool UBloxGPS::lookForLocation()
     return foundLocation;
 }
 
+bool UBloxGPS::hasLock()
+{
+    return (fixType >= 3 && fixType <= 4);
+}
+
 bool UBloxGPS::whileIdle()
 {
     // if using i2c or serial look too see if any chars are ready

src/gps/UBloxGPS.h

@@ -54,6 +54,7 @@ class UBloxGPS : public GPS
      * @return true if we've acquired a new location
      */
     virtual bool lookForLocation();
+    virtual bool hasLock();
 
     /// If possible force the GPS into sleep/low power mode
     virtual void sleep();