advapi32: Fix the error code on load failure.

dlls/advapi32/registry.c

@@ -3133,6 +3133,10 @@ static INT load_string(HINSTANCE hModule, UINT resId, LPWSTR *pResString)
     /* Strings are length-prefixed. Lowest nibble of resId is an index. */
     idxString = resId & 0xf;
     while (idxString--) pString += *pString + 1;
+    if (!*pString) {
+        SetLastError(ERROR_NOT_FOUND);
+        return 0;
+    }
 
     *pResString = pString + 1;
     return *pString;
@@ -3153,11 +3157,11 @@ static LONG load_mui_string(const WCHAR *file_name, UINT res_id, WCHAR *buffer,
     hModule = LoadLibraryExW(file_name, NULL,
                              LOAD_LIBRARY_AS_DATAFILE | LOAD_LIBRARY_AS_IMAGE_RESOURCE);
     if (!hModule)
-        return ERROR_BADKEY;
+        return GetLastError();
 
     size = load_string(hModule, res_id, &string);
     if (!size) {
-        result = ERROR_FILE_NOT_FOUND;
+        result = GetLastError();
         goto cleanup;
     }
     *req_chars = size + 1;
@@ -3210,10 +3214,6 @@ cleanup:
  * RETURNS
  *  Success: ERROR_SUCCESS,
  *  Failure: nonzero error code from winerror.h
- *
- * NOTES
- *  This is an API of Windows Vista, which wasn't available at the time this code
- *  was written. We have to check for the correct behaviour once it's available. 
  */
 LSTATUS WINAPI RegLoadMUIStringW(HKEY hKey, LPCWSTR pwszValue, LPWSTR pwszBuffer, DWORD cbBuffer,
     LPDWORD pcbData, DWORD dwFlags, LPCWSTR pwszBaseDir)

dlls/advapi32/tests/registry.c

@@ -3854,7 +3854,6 @@ static void test_RegLoadMUIString(void)
         BOOL use_sysdir;
         DWORD expected;
         DWORD broken_ret;
-        BOOL todo;
     } test_case[] = {
         /* 0 */
         { "",                  REG_SZ,        FALSE, ERROR_INVALID_DATA },
@@ -3868,9 +3867,9 @@ static void test_RegLoadMUIString(void)
         { "@%WineMuiTest2%",   REG_EXPAND_SZ, TRUE,  ERROR_SUCCESS },
         /*  8 */
         { "@%WineMuiExe%,a",   REG_SZ,        FALSE, ERROR_INVALID_DATA },
-        { "@%WineMuiExe%,-4",  REG_SZ,        FALSE, ERROR_NOT_FOUND, ERROR_FILE_NOT_FOUND, TRUE },
-        { "@%WineMuiExe%,-39", REG_SZ,        FALSE, ERROR_RESOURCE_NAME_NOT_FOUND, 0, TRUE },
-        { "@%WineMuiDat%,-16", REG_EXPAND_SZ, FALSE, ERROR_BAD_EXE_FORMAT, ERROR_FILE_NOT_FOUND, TRUE },
+        { "@%WineMuiExe%,-4",  REG_SZ,        FALSE, ERROR_NOT_FOUND, ERROR_FILE_NOT_FOUND },
+        { "@%WineMuiExe%,-39", REG_SZ,        FALSE, ERROR_RESOURCE_NAME_NOT_FOUND },
+        { "@%WineMuiDat%,-16", REG_EXPAND_SZ, FALSE, ERROR_BAD_EXE_FORMAT, ERROR_FILE_NOT_FOUND },
     };
 
     if (!pRegLoadMUIStringA || !pRegLoadMUIStringW)
@@ -4013,7 +4012,6 @@ static void test_RegLoadMUIString(void)
         ret = pRegLoadMUIStringW(hkey_main, tz_valueW, bufW, ARRAY_SIZE(bufW),
                                  &size, 0,
                                  test_case[i].use_sysdir ? sysdirW : NULL);
-        todo_wine_if(test_case[i].todo)
         ok(ret == test_case[i].expected ||
            broken(test_case[i].value[0] == '%' && ret == ERROR_SUCCESS /* vista */) ||
            broken(test_case[i].broken_ret && ret == test_case[i].broken_ret /* vista */),