(svn r6437) -Fix: reset the location of the last sound as that location can be outside the map when you are loading another (smaller) map. Thanks to MeusH for noticing.

industry_cmd.c

@@ -1903,6 +1903,7 @@ void InitializeIndustries(void)
 
 	_total_industries = 0;
 	_industry_sort_dirty = true;
+	_industry_sound_tile = 0;
 }
 
 const TileTypeProcs _tile_type_industry_procs = {