scrrun: Add test for correct string length returned from GetTempName.

dlls/scrrun/tests/filesystem.c

@@ -485,6 +485,7 @@ static void test_GetTempName(void)
     hr = IFileSystem3_GetTempName(fs3, &result);
     ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
     ok(!!wcsstr( result,L".tmp"), "GetTempName returned %s, expected .tmp suffix\n", debugstr_w(result));
+    todo_wine ok(SysStringLen(result) == lstrlenW(result),"GetTempName returned %s, has incorrect string len.\n", debugstr_w(result));
     SysFreeString(result);
 }