cryptui: Improve parameter checking.

dlls/cryptui/main.c

@@ -117,7 +117,8 @@ BOOL WINAPI CryptUIWizImport(DWORD dwFlags, HWND hwndParent, LPCWSTR pwszWizardT
 
     if (!(dwFlags & CRYPTUI_WIZ_NO_UI)) FIXME("UI not implemented\n");
 
-    if (!pImportSrc)
+    if (!pImportSrc ||
+     pImportSrc->dwSize != sizeof(CRYPTUI_WIZ_IMPORT_SRC_INFO))
     {
         SetLastError(E_INVALIDARG);
         return FALSE;

dlls/cryptui/tests/cryptui.c

@@ -197,7 +197,6 @@ static void test_crypt_ui_wiz_import(void)
     memset(&info, 0, sizeof(info));
     SetLastError(0xdeadbeef);
     ret = pCryptUIWizImport(CRYPTUI_WIZ_NO_UI, 0, NULL, &info, NULL);
-    todo_wine
     ok(!ret && GetLastError() == E_INVALIDARG,
      "expected E_INVALIDARG, got %08x\n", GetLastError());
     info.dwSize = sizeof(info);