Import infrastructure sharing patch

Strip trailing whitespace
Remove a leftover line form settings.ini

http://www.tt-forums.net/viewtopic.php?p=1008843#p1008843

src/depot_gui.cpp

@@ -25,6 +25,8 @@
 #include "tilehighlight_func.h"
 #include "window_gui.h"
 #include "vehiclelist.h"
+#include "company_base.h"
+#include "infrastructure_func.h"
 #include "order_backup.h"
 #include "zoom_func.h"
 
@@ -655,7 +657,7 @@ struct DepotWindow : Window {
 
 		/* Setup disabled buttons. */
 		TileIndex tile = this->window_number;
-		this->SetWidgetsDisabledState(!IsTileOwner(tile, _local_company),
+		this->SetWidgetsDisabledState(!Company::IsValidID(_local_company) || !IsInfraTileUsageAllowed(this->type, _local_company, tile),
 			WID_D_STOP_ALL,
 			WID_D_START_ALL,
 			WID_D_SELL,