SDL: SDL_SetHintWithPriority: better test if hint value has changed.

SDL Commits
1 
From c391bdc1607de896a0f0b577e2b4a57e5f5740b7 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Mon, 6 Jun 2022 09:31:35 -0400
Subject: [PATCH] SDL_SetHintWithPriority: better test if hint value has
 changed.

---
 src/SDL_hints.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SDL_hints.c b/src/SDL_hints.c
index 35eff7adb26..4629923d6e0 100644
--- a/src/SDL_hints.c
+++ b/src/SDL_hints.c
@@ -66,7 +66,7 @@ SDL_SetHintWithPriority(const char *name, const char *value,
             if (priority < hint->priority) {
                 return SDL_FALSE;
             }
-            if (!hint->value || !value || SDL_strcmp(hint->value, value) != 0) {
+            if ( ((hint->value == NULL) != (value == NULL)) || (value && (SDL_strcmp(hint->value, value) != 0)) ) {
                 for (entry = hint->callbacks; entry; ) {
                     /* Save the next entry in case this one is deleted */
                     SDL_HintWatch *next = entry->next;