Include wx/bitmap.h according to precompiled headers of wx/wx.h (with other minor cleaning).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39710 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/rgncmn.cpp

@@ -20,18 +20,14 @@
 
 #ifndef WX_PRECOMP
     #include "wx/dcmemory.h"
+    #include "wx/bitmap.h"
 #endif //WX_PRECOMP
 
-#include "wx/bitmap.h"
-
 #if wxUSE_IMAGE
     #include "wx/image.h"
 #endif
 
 
-//---------------------------------------------------------------------------
-
-
 
 wxBitmap wxRegion::ConvertToBitmap() const
 {
@@ -156,5 +152,3 @@ bool wxRegion::Union(const wxBitmap& WXUNUSED(bmp),
 }
 
 #endif
-
-//---------------------------------------------------------------------------