From 7e480ba889de9cd28918dd0e48cde516a1defd51 Mon Sep 17 00:00:00 2001
From: Nicholas Clark <nclark@vun---ha-ha-ha.cambridge.netbanx.com>
Date: Thu, 11 Feb 2010 14:42:54 +0000
Subject: [PATCH] Avoid returning 0 from output_str() when successfully writing an empty string.
 The correct return value is 1, for the 1 octet used for the tag.

---
 NYTProf.xs |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/NYTProf.xs b/NYTProf.xs
index 73ee551..20de22d 100644
--- a/NYTProf.xs
+++ b/NYTProf.xs
@@ -489,9 +489,11 @@ output_str(NYTP_file file, const char *str, I32 len) {    /* negative len signif
     if (retval <= 0)
         return retval;
 
-    total += retval = NYTP_write(file, str, len);
-    if (retval <= 0)
-        return retval;
+    if (len) {
+        total += retval = NYTP_write(file, str, len);
+        if (retval <= 0)
+            return retval;
+    }
 
     return total;
 }
-- 
1.6.0