SDL: N3DS: Prepend PrefPath with `sdmc:`.

From de5fa89b509a155d962b01de5b36955b5ba0df09 Mon Sep 17 00:00:00 2001
From: Pierre Wendling <[EMAIL REDACTED]>
Date: Mon, 14 Nov 2022 16:56:51 -0500
Subject: [PATCH] N3DS: Prepend PrefPath with `sdmc:`.

---
 src/filesystem/n3ds/SDL_sysfilesystem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/filesystem/n3ds/SDL_sysfilesystem.c b/src/filesystem/n3ds/SDL_sysfilesystem.c
index 06b4cd65b79b..9d0621bd480a 100644
--- a/src/filesystem/n3ds/SDL_sysfilesystem.c
+++ b/src/filesystem/n3ds/SDL_sysfilesystem.c
@@ -68,7 +68,7 @@ SDL_FORCE_INLINE char *
 MakePrefPath(const char *app)
 {
     char *pref_path;
-    if (SDL_asprintf(&pref_path, "/3ds/%s/", app) < 0) {
+    if (SDL_asprintf(&pref_path, "sdmc:/3ds/%s/", app) < 0) {
         SDL_OutOfMemory();
         return NULL;
     }