Fix win32 dwmapi enum.

core/sys/windows/dwmapi.odin

@@ -4,7 +4,7 @@ package sys_windows
 foreign import dwmapi "system:Dwmapi.lib"
 
 DWMWINDOWATTRIBUTE :: enum {
-	DWMWA_NCRENDERING_ENABLED,
+	DWMWA_NCRENDERING_ENABLED = 1,
 	DWMWA_NCRENDERING_POLICY,
 	DWMWA_TRANSITIONS_FORCEDISABLED,
 	DWMWA_ALLOW_NCPAINT,