patch 8.1.0253: saving and restoring window title does not always work

Problem:    Saving and restoring window title does not always work.
Solution:   Use the stack push and pop commands. (Kouichi Iwamoto,
            closes #3059)
diff --git a/src/os_win32.c b/src/os_win32.c
index 6357235..85c8a57 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -2695,7 +2695,7 @@
     if (g_fWindInitCalled)
     {
 #ifdef FEAT_TITLE
-	mch_restore_title(3);
+	mch_restore_title(SAVE_RESTORE_BOTH);
 	/*
 	 * Restore both the small and big icons of the console window to
 	 * what they were at startup.  Don't do this when the window is