From: Seven Du <dujinfang@gmail.com>
Date: Wed, 25 Sep 2013 12:02:39 +0000 (+0800)
Subject: only write when it make sense
X-Git-Tag: v1.5.8~75^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=135b1d70bbbe8deb4d9a73f4ca84b2e1972b11e1;p=thirdparty%2Ffreeswitch.git

only write when it make sense
---

diff --git a/src/switch_core_io.c b/src/switch_core_io.c
index 2b3c3b6d66..aad6192ece 100644
--- a/src/switch_core_io.c
+++ b/src/switch_core_io.c
@@ -773,7 +773,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_read_frame(switch_core_sessi
 					switch_buffer_create_dynamic(&session->raw_read_buffer, bytes * SWITCH_BUFFER_BLOCK_FRAMES, bytes * SWITCH_BUFFER_START_FRAMES, 0);
 				}
 
-				if (!switch_buffer_write(session->raw_read_buffer, read_frame->data, read_frame->datalen)) {
+				if (read_frame->datalen && (!switch_buffer_write(session->raw_read_buffer, read_frame->data, read_frame->datalen))) {
 					status = SWITCH_STATUS_MEMERR;
 					goto done;
 				}