mf: Use --prefer_native instead of DLL_WINE_PREATTACH.

Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/mf/Makefile.in

@@ -3,7 +3,7 @@ IMPORTLIB = mf
 IMPORTS   = advapi32 mfplat ole32 uuid mfuuid strmiids
 DELAYIMPORTS = evr
 
-EXTRADLLFLAGS = -mno-cygwin
+EXTRADLLFLAGS = -mno-cygwin -Wb,--prefer-native
 
 C_SRCS = \
 	copier.c \

dlls/mf/main.c

@@ -1076,8 +1076,6 @@ BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
 {
     switch (reason)
     {
-        case DLL_WINE_PREATTACH:
-            return FALSE;    /* prefer native version */
         case DLL_PROCESS_ATTACH:
             mf_instance = instance;
             DisableThreadLibraryCalls(instance);