Use StringFromGUID2 instead of StringFromCLSID in

dlls/shell32/shfldr_unixfs.c

@@ -104,23 +104,19 @@ typedef struct _UnixFolder {
  */
 BOOL UNIXFS_is_rooted_at_desktop(void) {
     HKEY hKey;
-    WCHAR *pwszCLSID_UnixDosFolder, wszRootedAtDesktop[69 + CHARS_IN_GUID] = { 
+    WCHAR wszRootedAtDesktop[69 + CHARS_IN_GUID] = { 
         'S','o','f','t','w','a','r','e','\\','M','i','c','r','o','s','o','f','t','\\',
         'W','i','n','d','o','w','s','\\','C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
         'E','x','p','l','o','r','e','r','\\','D','e','s','k','t','o','p','\\',
         'N','a','m','e','S','p','a','c','e','\\',0 }; 
 
-    if (FAILED(StringFromCLSID(&CLSID_UnixDosFolder, &pwszCLSID_UnixDosFolder)))
-        return FALSE;
-    
-    lstrcatW(wszRootedAtDesktop, pwszCLSID_UnixDosFolder);
-    CoTaskMemFree(pwszCLSID_UnixDosFolder);
-    
-    if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, wszRootedAtDesktop, 0, KEY_READ, &hKey) != ERROR_SUCCESS)
-        return FALSE;
-        
-    RegCloseKey(hKey);
-    return TRUE;
+    if (StringFromGUID2(&CLSID_UnixDosFolder, wszRootedAtDesktop + 69, CHARS_IN_GUID) &&
+        RegOpenKeyExW(HKEY_LOCAL_MACHINE, wszRootedAtDesktop, 0, KEY_READ, &hKey) == ERROR_SUCCESS) 
+    {
+        RegCloseKey(hKey);
+        return TRUE;
+    }
+    return FALSE;
 }
 
 /******************************************************************************