Add stub msxml4.dll.
diff --git a/configure.ac b/configure.ac
index 8016dd7..24aac13 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2391,6 +2391,7 @@
 WINE_CONFIG_DLL(mswsock,,[mswsock])
 WINE_CONFIG_DLL(msxml3)
 WINE_CONFIG_TEST(dlls/msxml3/tests)
+WINE_CONFIG_DLL(msxml4)
 WINE_CONFIG_DLL(nddeapi,,[nddeapi])
 WINE_CONFIG_DLL(netapi32,,[netapi32])
 WINE_CONFIG_TEST(dlls/netapi32/tests)