fix(printf): fctprintf() must not append null terminator

Fixes #39, references #19

1 files changed, 4 insertions, 2 deletions

diff --git a/printf.c b/printf.c
index df88d3d..c9a1175 100644
--- a/printf.c
+++ b/printf.c
@@ -134,8 +134,10 @@ static inline void _out_char(char character, void* buffer, size_t idx, size_t ma
 static inline void _out_fct(char character, void* buffer, size_t idx, size_t maxlen)

 {

   (void)idx; (void)maxlen;

-  // buffer is the output fct pointer

-  ((out_fct_wrap_type*)buffer)->fct(character, ((out_fct_wrap_type*)buffer)->arg);

+  if (character) {

+    // buffer is the output fct pointer

+    ((out_fct_wrap_type*)buffer)->fct(character, ((out_fct_wrap_type*)buffer)->arg);

+  }

 }