SDL_image: libwebp: fix building webpdemux.dll

From d40d6cc94e4601b4d23e9e886bbe168fda567b20 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Tue, 23 May 2023 20:44:47 +0200
Subject: [PATCH] libwebp: fix building webpdemux.dll

---
 external/libwebp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/libwebp b/external/libwebp
index 918d4284..8333c34e 160000
--- a/external/libwebp
+++ b/external/libwebp
@@ -1 +1 @@
-Subproject commit 918d428493e2dcc32e0d680816515637eb66ce7e
+Subproject commit 8333c34e62ff907112bb556aab2725164abdccfe