Cygwin/X: Initialize native HWND atom when built !XWIN_MULTIWINDOWEXTWM

Fix the native HWND atom identifier to be initialized correctly, when built without external WM support

This is neccessary for native window naming to work correctly in multiwindow internal WM mode.

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>

hw/xwin/winmultiwindowwm.c

@@ -58,6 +58,10 @@
 #include "winwindow.h"
 #ifdef XWIN_MULTIWINDOWEXTWM
 #include "windowswmstr.h"
+#else
+/* We need the native HWND atom for intWM, so for consistency use the
+   same name as extWM would if we were building with enabled... */
+#define WINDOWSWM_NATIVE_HWND "_WINDOWSWM_NATIVE_HWND"
 #endif
 
 extern void winDebug(const char *format, ...);
@@ -1256,11 +1260,10 @@ winInitMultiWindowWM (WMInfoPtr pWMInfo, WMProcArgPtr pProcArg)
   pWMInfo->atmWmDelete = XInternAtom (pWMInfo->pDisplay,
 				      "WM_DELETE_WINDOW",
 				      False);
-#ifdef XWIN_MULTIWINDOWEXTWM
+
   pWMInfo->atmPrivMap  = XInternAtom (pWMInfo->pDisplay,
 				      WINDOWSWM_NATIVE_HWND,
 				      False);
-#endif
 
 
   if (1) {