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/common/imagall.cpp

@@ -11,16 +11,15 @@
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #endif
 
-#ifndef WX_PRECOMP
-#endif
-
-#include "wx/image.h"
-
 #if wxUSE_IMAGE
 
+#ifndef WX_PRECOMP
+    #include "wx/image.h"
+#endif
+
 //-----------------------------------------------------------------------------
 // This function allows dynamic access to all image handlers compile within
 // the library. This function should be in a separate file as some compilers