From 90c50dc7761b1bc88edf881d60a830e5a4f0f55a Mon Sep 17 00:00:00 2001
From: DiSlord <dislord@mail.ru>
Date: Sun, 16 May 2021 15:30:16 +0300
Subject: [PATCH] Skip %c char if input zero

---
 chprintf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chprintf.c b/chprintf.c
index a149a86..0b24e38 100644
--- a/chprintf.c
+++ b/chprintf.c
@@ -350,7 +350,8 @@ int chvprintf(BaseSequentialStream *chp, const char *fmt, va_list ap) {
     switch (c) {
     case 'c':
       state&=~PAD_ZERO;
-      *p++ = va_arg(ap, int);
+      c = va_arg(ap, int);
+      if (c) *p++ = c;
       break;
     case 's':
       state&=~PAD_ZERO;