From: Seven Du <dujinfang@gmail.com>
Date: Sat, 6 Sep 2014 10:29:19 +0000 (+0800)
Subject: fix return value
X-Git-Tag: v1.4.8~2^2~28
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa15994c7f4dc447fe7ca2a60ca32b99e7036e47;p=thirdparty%2Ffreeswitch.git

fix return value
---

diff --git a/src/switch_cpp.cpp b/src/switch_cpp.cpp
index 2702862027..16179cfb8a 100644
--- a/src/switch_cpp.cpp
+++ b/src/switch_cpp.cpp
@@ -542,8 +542,10 @@ SWITCH_DECLARE(const char *) Stream::read(int *len)
 
 	buff = stream_p->read_function(stream_p, len);
 
-	if (!buff) return NULL;
-	if (len < 0) return NULL;
+	if (!buff || *len <= 0) {
+		*len = 0;
+		return NULL;
+	}
 
 	return (const char *)buff;
 }