shell32: Add SHMultiFileProperties stub.

dlls/shell32/shell32.spec

@@ -409,6 +409,7 @@
 @ stdcall SHIsFileAvailableOffline(wstr ptr)
 @ stdcall SHLoadInProc(ptr)
 @ stdcall SHLoadNonloadedIconOverlayIdentifiers()
+@ stdcall SHMultiFileProperties(ptr long)
 @ stdcall SHOpenFolderAndSelectItems(ptr long ptr long)
 @ stdcall SHOpenWithDialog(long ptr)
 @ stdcall SHParseDisplayName(wstr ptr ptr long ptr)

dlls/shell32/shlfileop.c

@@ -1799,3 +1799,13 @@ HRESULT WINAPI SHPathPrepareForWriteW(HWND hwnd, IUnknown *modless, LPCWSTR path
     else
         return HRESULT_FROM_WIN32(ERROR_DIRECTORY);
 }
+
+/*************************************************************************
+ * SHMultiFileProperties [SHELL32.@]
+ */
+
+HRESULT WINAPI SHMultiFileProperties(IDataObject *pdtobj, DWORD flags)
+{
+    FIXME("stub: %p %u\n", pdtobj, flags);
+    return E_NOTIMPL;
+}