From bfeacc901606ac3c00fac5b7c7779617b7c10579 Mon Sep 17 00:00:00 2001
From: Renat Nasyrov <renat-nasyrov@yandex.ru>
Date: Fri, 17 Jul 2026 00:02:40 +0200
Subject: [PATCH] Check empty sample by .len, not by .num_samples field.

pdx.c:28 leaves .num_samples uninitialized (=initialized with garbage) if the input sample is not used. This leads to program crash.
---
 pdx2sf2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdx2sf2.c b/pdx2sf2.c
index 834837d..b2ff260 100644
--- a/pdx2sf2.c
+++ b/pdx2sf2.c
@@ -90,7 +90,7 @@ int main(int argc, char **argv) {
 		memset(instGenLists, 0, genSize);
 		x = 0;
 		for(int j = 0; j < PDX_NUM_SAMPLES; j++) {
-			if(p.samples[j].num_samples > 0) {
+			if(p.samples[j].len > 0) {
 				int k = x * GENS_PER_ZONE;
 				instGenLists[k].sfGenOper = keyRange;
 				instGenLists[k].genAmount.ranges.byHi = BASE_NOTE + j;