From 212cbe7d854290286bb8d3b0d9704a1d77ce7472 Mon Sep 17 00:00:00 2001
From: Theo Arends <11044339+arendst@users.noreply.github.com>
Date: Sun, 28 Aug 2022 14:51:32 +0200
Subject: [PATCH] Fix extra space in non-decimal numbers

Fix extra space in non-decimal numbers (#16365)
---
 lib/default/Ext-printf/src/ext_printf.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/default/Ext-printf/src/ext_printf.cpp b/lib/default/Ext-printf/src/ext_printf.cpp
index cb2e4d0d8..d15f4bcee 100644
--- a/lib/default/Ext-printf/src/ext_printf.cpp
+++ b/lib/default/Ext-printf/src/ext_printf.cpp
@@ -335,7 +335,8 @@ int32_t ext_vsnprintf_P(char * out_buf, size_t buf_len, const char * fmt_P, va_l
                 if (isnan(number) || isinf(number)) {
                   new_val_str = "null";
                 } else {
-                  dtostrf(*(float*)cur_val, (decimals + 2), decimals, hex);
+                  uint32_t len = (decimals) ? decimals +2 : 1;
+                  dtostrf(*(float*)cur_val, len, decimals, hex);
 
                   if (truncate) {
                     uint32_t last = strlen(hex) - 1;