headers: allow IsWow64Process in winstore builds

https://docs.microsoft.com/en-us/uwp/win32-and-com/win32-apis#apis-from-api-ms-win-core-wow64-l1-1-0dll
Signed-off-by: Liu Hao <lh_mouse@126.com>
diff --git a/mingw-w64-headers/include/wow64apiset.h b/mingw-w64-headers/include/wow64apiset.h
index f07ae02..eefd694 100644
--- a/mingw-w64-headers/include/wow64apiset.h
+++ b/mingw-w64-headers/include/wow64apiset.h
@@ -17,6 +17,9 @@
 #if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_DESKTOP)
   WINBASEAPI WINBOOL WINAPI Wow64DisableWow64FsRedirection (PVOID *OldValue);
   WINBASEAPI WINBOOL WINAPI Wow64RevertWow64FsRedirection (PVOID OlValue);
+#endif
+
+#if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_APP)
   WINBASEAPI WINBOOL WINAPI IsWow64Process (HANDLE hProcess, PBOOL Wow64Process);
 #endif