msxml3: Don't unload external libraries on process shutdown.

dlls/msxml3/main.c

@@ -209,7 +209,7 @@ static void init_libxslt(void)
 #endif
 }
 
-BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv)
+BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID reserved)
 {
     MSXML_hInstance = hInstDLL;
 
@@ -235,12 +235,12 @@ BOOL WINAPI DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv)
         DisableThreadLibraryCalls(hInstDLL);
         break;
     case DLL_PROCESS_DETACH:
+        if (reserved) break;
 #ifdef SONAME_LIBXSLT
         if (libxslt_handle)
         {
             pxsltCleanupGlobals();
             wine_dlclose(libxslt_handle, NULL, 0);
-            libxslt_handle = NULL;
         }
 #endif
 #ifdef HAVE_LIBXML2