utils_time.c: fix implicit conversion warning

  CC       src/daemon/collectd-utils_time.o
src/daemon/utils_time.c:153:14: warning: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'int' [-Wshorten-64-to-32]
  if ((len = strftime(pos, size_left, "%Y-%m-%dT%H:%M:%S", t_tm)) == 0)
           ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.

diff --git a/src/daemon/utils_time.c b/src/daemon/utils_time.c
index 5c0f68e..4637122 100644 (file)
--- a/src/daemon/utils_time.c
+++ b/src/daemon/utils_time.c
@@ -146,7 +146,7 @@ static int format_zone(char *buffer, size_t buffer_size,
 int format_rfc3339(char *buffer, size_t buffer_size, struct tm const *t_tm,
                    long nsec, bool print_nano, char const *zone) /* {{{ */
 {
-  int len;
+  size_t len;
   char *pos = buffer;
   size_t size_left = buffer_size;