Profiles: Fix plotting of empty geometry profiles, causing (non-blocking) error in the console

src/Model/Geometry/ProfileXYZ.py

@@ -1003,7 +1003,7 @@ class ProfileXYZ(Profile, SQLSubModel):
             Projection of the points of the profile on a plane.
         """
         if self.nb_points < 2:
-            return [0.0]
+            return [0.0] * self.nb_points
         else:
             if self.station_up_to_date:
                 return self._station