Set HBITMAP and its parameters in one call

To avoid separate calls to SetWidth/Height/Size/Depth functions after calling SetHBITMAP() use newly implemented InitFromHBITMAP() function which allows to set HBITMAP together with its parameters in one call.

include/wx/msw/bitmap.h

@@ -201,6 +201,8 @@ public:
 public:
     void SetHBITMAP(WXHBITMAP bmp) { SetHandle((WXHANDLE)bmp); }
     WXHBITMAP GetHBITMAP() const { return (WXHBITMAP)GetHandle(); }
+    bool InitFromHBITMAP(WXHBITMAP bmp, int width, int height, int depth);
+    void ResetHBITMAP() { InitFromHBITMAP(NULL, 0, 0, 0); }
 
     void SetSelectedInto(wxDC *dc);
     wxDC *GetSelectedInto() const;