kernel32: Don't return a parent locale for neutral locales in GetLocaleInfoEx.

dlls/kernel32/locale.c

@@ -1807,16 +1807,22 @@ INT WINAPI GetLocaleInfoEx(LPCWSTR locale, LCTYPE info, LPWSTR buffer, INT len)
     if (!lcid) return 0;
 
     /* special handling for neutral locale names */
-    if (info == LOCALE_SNAME && locale && strlenW(locale) == 2)
+    if (locale && strlenW(locale) == 2)
     {
-        if (len && len < 3)
+        switch (info)
         {
-            SetLastError(ERROR_INSUFFICIENT_BUFFER);
-            return 0;
+        case LOCALE_SNAME:
+            if (len && len < 3)
+            {
+                SetLastError(ERROR_INSUFFICIENT_BUFFER);
+                return 0;
+            }
+            if (len) strcpyW(buffer, locale);
+            return 3;
+        case LOCALE_SPARENT:
+            if (len) buffer[0] = 0;
+            return 1;
         }
-
-        if (len) strcpyW(buffer, locale);
-        return 3;
     }
 
     return GetLocaleInfoW(lcid, info, buffer, len);

dlls/kernel32/tests/locale.c

@@ -4483,6 +4483,14 @@ static void test_GetLocaleInfoEx(void)
         ok(ret == lstrlenW(bufferW)+1, "got %d\n", ret);
         ok(!lstrcmpW(bufferW, enuW), "got %s\n", wine_dbgstr_w(bufferW));
 
+        ret = pGetLocaleInfoEx(enusW, LOCALE_SPARENT, bufferW, sizeof(bufferW)/sizeof(WCHAR));
+        ok(ret == lstrlenW(bufferW)+1, "got %d\n", ret);
+        ok(!lstrcmpW(bufferW, enW), "got %s\n", wine_dbgstr_w(bufferW));
+
+        ret = pGetLocaleInfoEx(enW, LOCALE_SPARENT, bufferW, sizeof(bufferW)/sizeof(WCHAR));
+        ok(ret == 1, "got %d\n", ret);
+        ok(!bufferW[0], "got %s\n", wine_dbgstr_w(bufferW));
+
         ret = pGetLocaleInfoEx(enW, LOCALE_SCOUNTRY, bufferW, sizeof(bufferW)/sizeof(WCHAR));
         ok(ret == lstrlenW(bufferW)+1, "got %d\n", ret);
         if ((PRIMARYLANGID(LANGIDFROMLCID(GetSystemDefaultLCID())) != LANG_ENGLISH) ||