SDL: wayland: Don't try to restore non-resizable windows

SDL Commits
1 
From e35c3872dc6a8f7741baba8b786b202cef7503ac Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Thu, 12 Jan 2023 16:32:04 -0500
Subject: [PATCH] wayland: Don't try to restore non-resizable windows

Libdecor can crash if attempting to un-maximize a window that was not set as resizable.
---
 src/video/wayland/SDL_waylandwindow.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/video/wayland/SDL_waylandwindow.c b/src/video/wayland/SDL_waylandwindow.c
index 84b2ca9fd403..9c5ccb9f62c0 100644
--- a/src/video/wayland/SDL_waylandwindow.c
+++ b/src/video/wayland/SDL_waylandwindow.c
@@ -1699,6 +1699,10 @@ void Wayland_RestoreWindow(_THIS, SDL_Window *window)
         return;
     }
 
+    if (!(window->flags & SDL_WINDOW_RESIZABLE)) {
+            return;
+    }
+
     /* Set this flag now even if we never actually maximized, eventually
      * ShowWindow will take care of it along with the other window state.
      */