SDL: Ignore unknown WM_SIZE types.

SDL Commits
1 
From 829e15a49079ef22eeb69f6fa19b41889312ebda Mon Sep 17 00:00:00 2001
From: Esme Povirk <[EMAIL REDACTED]>
Date: Sat, 5 Feb 2022 14:38:39 -0600
Subject: [PATCH] Ignore unknown WM_SIZE types.

According to MSDN, we can also get SIZE_MAXHIDE and SIZE_MAXSHOW,
based on state changes to other windows. It's not clear under
what circumstances this will happen (I saw some docs indicating
it may require multiple application windows), but it doesn't seem
right to treat them as RESTORED.
---
 src/video/windows/SDL_windowsevents.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/video/windows/SDL_windowsevents.c b/src/video/windows/SDL_windowsevents.c
index 59236320661..0619f67dd5c 100644
--- a/src/video/windows/SDL_windowsevents.c
+++ b/src/video/windows/SDL_windowsevents.c
@@ -1167,10 +1167,12 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
                 SDL_SendWindowEvent(data->window,
                     SDL_WINDOWEVENT_MINIMIZED, 0, 0);
                 break;
-            default:
+            case SIZE_RESTORED:
                 SDL_SendWindowEvent(data->window,
                     SDL_WINDOWEVENT_RESTORED, 0, 0);
                 break;
+            default:
+                break;
             }
         }
         break;