SDL: Fix n3ds/SDL_syssem.c:SDL_SignalSemaphore (libsdl-org/SDL#12411) (8cdeb)

SDL Commits
1 
From 8cdeb1a35a92663927bd7b6f3f3e3f172495b18b Mon Sep 17 00:00:00 2001
From: ds-sloth <[EMAIL REDACTED]>
Date: Fri, 7 Mar 2025 20:03:37 -0500
Subject: [PATCH] Fix n3ds/SDL_syssem.c:SDL_SignalSemaphore
 (libsdl-org/SDL#12411)

(cherry picked from commit 0306b5a865b7e7e8ff52f107c00c002cdddaae02)
---
 src/thread/n3ds/SDL_syssem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/thread/n3ds/SDL_syssem.c b/src/thread/n3ds/SDL_syssem.c
index 3207a2dfc0779..c03030b2de16f 100644
--- a/src/thread/n3ds/SDL_syssem.c
+++ b/src/thread/n3ds/SDL_syssem.c
@@ -102,7 +102,7 @@ Uint32 SDL_GetSemaphoreValue(SDL_Semaphore *sem)
 
 void SDL_SignalSemaphore(SDL_Semaphore *sem)
 {
-    if (sem) {
+    if (!sem) {
         return;
     }