define HDS_FLAT outside of __DMC__ section so that it's really visible by VC6

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57105 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/missing.h

@@ -235,6 +235,9 @@ typedef struct wxtagNMLVCUSTOMDRAW_ {
 #ifndef HDS_HOTTRACK
     #define HDS_HOTTRACK 4
 #endif
+#ifndef HDS_FLAT
+    #define HDS_FLAT 0x0200
+#endif
 
 #ifndef HDF_SORTUP
     #define HDF_SORTUP   0x0400
@@ -365,9 +368,6 @@ typedef struct _OSVERSIONINFOEX {
 #ifndef HDS_FULLDRAG
     #define HDS_FULLDRAG 0x0080
 #endif
-#ifndef HDS_FLAT
-    #define HDS_FLAT 0x0200
-#endif
 
 
 #ifndef HDN_BEGINDRAG