From 084db19107aafe084cf6ff0d8d3e950a82303b9a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joakim=20Nohlg=C3=A5rd?= <joakim.nohlgard@eistec.se>
Date: Wed, 21 Jun 2017 18:21:55 +0200
Subject: [PATCH] sys/fmt: Fix unintentional pointer advancement for negative
 numbers in fmt_float

---
 sys/fmt/fmt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/fmt/fmt.c b/sys/fmt/fmt.c
index e2cc6c3a4df4..62e69cfc6ae3 100644
--- a/sys/fmt/fmt.c
+++ b/sys/fmt/fmt.c
@@ -274,12 +274,11 @@ size_t fmt_float(char *out, float f, unsigned precision)
 
     uint32_t fraction = f * _tenmap[precision];
 
-    size_t res = negative;
     if (negative && out) {
         *out++ = '-';
     }
 
-    res += fmt_u32_dec(out, integer);
+    size_t res = fmt_u32_dec(out, integer);
     if (precision && fraction) {
         if (out) {
             out += res;
@@ -289,6 +288,7 @@ size_t fmt_float(char *out, float f, unsigned precision)
         }
         res += (1 + precision);
     }
+    res += negative;
 
     return res;
 }