glu32: Use --prefer-native instead of DLL_WINE_PREATTACH.

dlls/glu32/Makefile.in

@@ -2,7 +2,7 @@ MODULE    = glu32.dll
 IMPORTLIB = glu32
 IMPORTS   = opengl32
 
-EXTRADLLFLAGS = -mno-cygwin
+EXTRADLLFLAGS = -mno-cygwin -Wb,--prefer-native
 
 C_SRCS = \
 	geom.c \

dlls/glu32/glu.c

@@ -276,19 +276,3 @@ GLboolean WINAPI wine_gluCheckExtension( const GLubyte *extName, const GLubyte *
     }
     return GLU_FALSE;
 }
-
-/***********************************************************************
- *		DllMain
- */
-BOOL WINAPI DllMain( HINSTANCE instance, DWORD reason, LPVOID reserved )
-{
-    switch (reason)
-    {
-        case DLL_WINE_PREATTACH:
-            return FALSE;    /* prefer native version */
-        case DLL_PROCESS_ATTACH:
-            DisableThreadLibraryCalls( instance );
-            break;
-    }
-    return TRUE;
-}