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/imagjpeg.cpp

@@ -22,10 +22,9 @@
     #include "wx/log.h"
     #include "wx/app.h"
     #include "wx/intl.h"
+    #include "wx/bitmap.h"
 #endif
 
-#include "wx/bitmap.h"
-
 // NB: Some compilers define boolean type in Windows headers
 //     (e.g. Watcom C++, but not Open Watcom).
 //     This causes a conflict with jmorecfg.h header from libjpeg, so we have