Fix projection

Do not do any projection before target coordinates have been set.

mavsdk_wrapper.cpp

@@ -56,6 +56,7 @@ static const float DEFAULT_SPEED = 16;
 static float last_override_altitude;
 static float last_override_speed;
 
+static bool first_coordinate_entered = false;
 static bool do_projection = false;
 
 // Logs functions
@@ -164,6 +165,9 @@ static int doReposition(float la, float lo, float radius, float y) {
 }
 
 static void doReposition_async(float la, float lo, float radius, float y) {
+    if (!first_coordinate_entered) {
+      first_coordinate_entered = true;
+    }
     std::thread(doReposition, la, lo, radius, y).detach();
 }
 
@@ -223,6 +227,7 @@ void updateLogAndProjection(void) {
             << metrics.airspeed_m_s << ";" << metrics.climb_rate_m_s;
         log(oss.str());
 
+        if (first_coordinate_entered) {
           if (do_projection) {
               updateProjection(current_position[0], current_position[1]);
           } else {
@@ -234,6 +239,7 @@ void updateLogAndProjection(void) {
             ); 
           }
         }
+    }
 }
 
 // Connexion management functions