fix server waypoint coordinates

Author: aman-coder03

mslib/msui/flighttrack.py

@@ -148,8 +148,8 @@ def __init__(self, lat=0., lon=0., flightlevel=0., location="", comments=""):
         self.lat = lat
         self.lon = lon
 
-        # Only resolve location name if coordinates are not provided
-        if (lat == 0.0 and lon == 0.0) and location:
+        # Only resolve location name if coordinates are truly missing
+        if (lat is None or lon is None) and location:
             locations = config_loader(dataset='locations')
             if location in locations:
                 self.lat, self.lon = locations[location]