shlwapi: Correctly treat '.' when enumerating files in PathIsDirectoryEmptyW.

dlls/shlwapi/path.c

@@ -3872,7 +3872,7 @@ BOOL WINAPI PathIsDirectoryEmptyW(LPCWSTR lpszPath)
   WCHAR szSearch[MAX_PATH];
   DWORD dwLen;
   HANDLE hfind;
-  BOOL retVal = FALSE;
+  BOOL retVal = TRUE;
   WIN32_FIND_DATAW find_data;
 
   TRACE("(%s)\n",debugstr_w(lpszPath));
@@ -3888,14 +3888,23 @@ BOOL WINAPI PathIsDirectoryEmptyW(LPCWSTR lpszPath)
 
   strcpyW(szSearch + dwLen, szAllFiles);
   hfind = FindFirstFileW(szSearch, &find_data);
-  if (hfind != INVALID_HANDLE_VALUE)
+  if (hfind == INVALID_HANDLE_VALUE)
+    return FALSE;
+
+  do
   {
-    if (find_data.cFileName[0] == '.' && find_data.cFileName[1] == '.')
-      /* The only directory entry should be the parent */
-      retVal = !FindNextFileW(hfind, &find_data);
-    FindClose(hfind);
+    if (find_data.cFileName[0] == '.')
+    {
+      if (find_data.cFileName[1] == '\0') continue;
+      if (find_data.cFileName[1] == '.' && find_data.cFileName[2] == '\0') continue;
     }
 
+    retVal = FALSE;
+    break;
+  }
+  while (FindNextFileW(hfind, &find_data));
+
+  FindClose(hfind);
   return retVal;
 }