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

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39957 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/bitmap.cpp

@@ -36,19 +36,19 @@
     #include "wx/dcmemory.h"
     #include "wx/icon.h"
     #include "wx/log.h"
+    #include "wx/image.h"
 #endif
 
 #include "wx/msw/private.h"
 
 #if wxUSE_WXDIB
-#include "wx/msw/dib.h"
+    #include "wx/msw/dib.h"
 #endif
 
-#include "wx/image.h"
 #include "wx/xpmdecod.h"
 
 #ifdef wxHAVE_RAW_BITMAP
-#include "wx/rawbmp.h"
+    #include "wx/rawbmp.h"
 #endif
 
 // missing from mingw32 header