write_http plugin: Be extra conservative in wh_reset_buffer().

[collectd.git] / src / utils_format_json.c

diff --git a/src/utils_format_json.c b/src/utils_format_json.c
index 2c0e4cd..99996b4 100644 (file)
--- a/src/utils_format_json.c
+++ b/src/utils_format_json.c
@@ -25,6 +25,7 @@
  **/
 
 #include "collectd.h"
+
 #include "plugin.h"
 #include "common.h"
 
@@ -297,7 +298,7 @@ static int meta_data_keys_to_json (char *buffer, size_t buffer_size, /* {{{ */
     }
   } /* for (keys) */
 
-  if (offset <= 0)
+  if (offset == 0)
     return (ENOENT);
 
   buffer[0] = '{'; /* replace leading ',' */