write_sensu plugin: use the right size for buffer

I missed that r is a pointer, not an array.
Fixes CID #185580

diff --git a/src/write_sensu.c b/src/write_sensu.c
index cf6a6bd..bda3327 100644 (file)
--- a/src/write_sensu.c
+++ b/src/write_sensu.c
@@ -626,7 +626,7 @@ static char *replace_str(const char *str, const char *old, /* {{{ */
     r += newlen;
     p = q + oldlen;
   }
-  sstrncpy(r, p, sizeof(r));
+  sstrncpy(r, p, retlen + 1);
 
   return ret;
 } /* }}} char *replace_str */