Update listbox directory mode to new FindFirstFile error code.

diff --git a/controls/listbox.c b/controls/listbox.c
index c122c2a..cb4e7b4 100644
--- a/controls/listbox.c
+++ b/controls/listbox.c
@@ -1732,7 +1732,8 @@
         /* scan directory */
         if ((handle = FindFirstFileW(filespec, &entry)) == INVALID_HANDLE_VALUE)
         {
-            if (GetLastError() != ERROR_NO_MORE_FILES) return LB_ERR;
+	     int le = GetLastError();
+            if ((le != ERROR_NO_MORE_FILES) && (le != ERROR_FILE_NOT_FOUND)) return LB_ERR;
         }
         else
         {