From dd2e0d1df3eeb934c291dd6197f722e419dd3e43 Mon Sep 17 00:00:00 2001
From: arjun23496 <arjun.k018@gmail.com>
Date: Wed, 31 Aug 2016 16:11:59 +0530
Subject: [PATCH] minor bug fix header replace

---
 netlib/http/headers.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/netlib/http/headers.py b/netlib/http/headers.py
index f4cf8b7b7..5f724f6df 100644
--- a/netlib/http/headers.py
+++ b/netlib/http/headers.py
@@ -172,6 +172,7 @@ class Headers(multidict.MultiDict):
             repl = strutils.escaped_str_to_bytes(repl)
         pattern = re.compile(pattern, flags)
         replacements = 0
+        flag_count = count > 0
 
         fields = []
         for name, value in self.fields:
@@ -183,10 +184,13 @@ class Headers(multidict.MultiDict):
                 # There's not much we can do about this, so we just keep the header as-is.
                 pass
             else:
-                count -= n
                 replacements += n
-                if count == 0:
-                    break;
+                
+                if flag_count:
+                    count -= n
+                    if count == 0:
+                        break;
+                                  
             fields.append((name, value))
         self.fields = tuple(fields)
         return replacements