SDL: Fix SIGSEV in SDL_error. Re-apply same pattern on this uncompiled code (see #5795)

SDL Commits
1 
From f815580dde2de9667af5ca8b43f9590f2fac1aab Mon Sep 17 00:00:00 2001
From: Sylvain <[EMAIL REDACTED]>
Date: Tue, 28 Jun 2022 13:09:38 +0200
Subject: [PATCH] Fix SIGSEV in SDL_error. Re-apply same pattern on this
 uncompiled code (see #5795)

---
 src/dynapi/SDL_dynapi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/dynapi/SDL_dynapi.c b/src/dynapi/SDL_dynapi.c
index 994a2c28543..19eaf2a0fa0 100644
--- a/src/dynapi/SDL_dynapi.c
+++ b/src/dynapi/SDL_dynapi.c
@@ -73,13 +73,17 @@ static void SDL_InitDynamicAPI(void);
     _static int SDLCALL SDL_SetError##name(SDL_PRINTF_FORMAT_STRING const char *fmt, ...) { \
         char buf[128], *str = buf; \
         int result; \
-        va_list ap; initcall; va_start(ap, fmt); \
+        va_list ap; initcall; \
+        va_start(ap, fmt); \
         result = jump_table.SDL_vsnprintf(buf, sizeof(buf), fmt, ap); \
+        va_end(ap); \
         if (result >= 0 && (size_t)result >= sizeof(buf)) { \
             size_t len = (size_t)result + 1; \
             str = (char *)jump_table.SDL_malloc(len); \
             if (str) { \
+                va_start(ap, fmt); \
                 result = jump_table.SDL_vsnprintf(str, len, fmt, ap); \
+                va_end(ap); \
             } \
         } \
         va_end(ap); \