SDL: Fix potential memory leak in SDL_AddHintCallback

SDL Commits
1 
From fe46569cce4b9b14ab6d415a152ccd5b4c6abc0e Mon Sep 17 00:00:00 2001
From: Mathieu Eyraud <[EMAIL REDACTED]>
Date: Sat, 21 May 2022 10:44:50 +0200
Subject: [PATCH] Fix potential memory leak in SDL_AddHintCallback

---
 src/SDL_hints.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/SDL_hints.c b/src/SDL_hints.c
index d3fc8ab46ed..0005f4908ea 100644
--- a/src/SDL_hints.c
+++ b/src/SDL_hints.c
@@ -179,6 +179,7 @@ SDL_AddHintCallback(const char *name, SDL_HintCallback callback, void *userdata)
         }
         hint->name = SDL_strdup(name);
         if (!hint->name) {
+            SDL_free(entry);
             SDL_free(hint);
             SDL_OutOfMemory();
             return;