(svn r11525) -Fix: do not do all kinds of 'updates' for town, waypoint, station and other signs when you haven't converted the map to the 'current' format as that means you are going to read data in the 'old' format when you assume that it is in the 'current' format.

src/town_cmd.cpp

@@ -311,6 +311,15 @@ void UpdateTownVirtCoord(Town *t)
 	MarkTownSignDirty(t);
 }
 
+/** Update the virtual coords needed to draw the town sign for all towns. */
+void UpdateAllTownVirtCoords()
+{
+	Town *t;
+	FOR_ALL_TOWNS(t) {
+		UpdateTownVirtCoord(t);
+	}
+}
+
 /**
  * Change the towns population
  * @param t Town which polulation has changed
@@ -2521,7 +2530,6 @@ void AfterLoadTown()
 	Town *t;
 	FOR_ALL_TOWNS(t) {
 		UpdateTownRadius(t);
-		UpdateTownVirtCoord(t);
 	}
 	_town_sort_dirty = true;
 }