Fixed compile warning
diff --git a/src/stdlib/SDL_malloc.c b/src/stdlib/SDL_malloc.c
index c1d3cd6..db3b107 100644
--- a/src/stdlib/SDL_malloc.c
+++ b/src/stdlib/SDL_malloc.c
@@ -2946,13 +2946,17 @@ static void
internal_malloc_stats(mstate m)
{
if (!PREACTION(m)) {
+#ifndef LACKS_STDIO_H
size_t maxfp = 0;
+#endif
size_t fp = 0;
size_t used = 0;
check_malloc_state(m);
if (is_initialized(m)) {
msegmentptr s = &m->seg;
+#ifndef LACKS_STDIO_H
maxfp = m->max_footprint;
+#endif
fp = m->footprint;
used = fp - (m->topsize + TOP_FOOT_SIZE);