Codechange: Scrollbar methods now accept size_t.

This clears up a lot of casts from size_t to int.

src/bridge_gui.cpp

@@ -167,7 +167,7 @@ public:
 		this->bridges->NeedResort();
 		this->SortBridgeList();
 
-		this->vscroll->SetCount((uint)bl->size());
+		this->vscroll->SetCount(bl->size());
 	}
 
 	~BuildBridgeWindow()