Fix #12114: Viewport coords of crashed aircraft not updated when falling. (#12424)

This results in the aircraft glitching as the wrong viewport area is drawn.

(cherry picked from commit d11622b9a0030ea7c387c78c913e284754f17b5c)

src/aircraft_cmd.cpp

@@ -1273,6 +1273,7 @@ static bool HandleCrashedAircraft(Aircraft *v)
 			v->crashed_counter = 500;
 			v->z_pos++;
 		}
+		SetAircraftPosition(v, v->x_pos, v->y_pos, v->z_pos);
 	}
 
 	if (v->crashed_counter < 650) {