extra protection against unruly practice

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8313 d0543943-73ff-0310-b7d9-9358b9ac24b2

diff --git a/src/switch_core_io.c b/src/switch_core_io.c
index fb83d1b017b78bd1a3c39edc33ed8ae0136cfebe..212033ffd5da888064c3151131e57f3b1927bdab 100644 (file)
--- a/src/switch_core_io.c
+++ b/src/switch_core_io.c
@@ -501,6 +501,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_write_frame(switch_core_sess
                return SWITCH_STATUS_FALSE;
        }
 
+       if (!(session->write_codec && session->write_codec->implementation)) {
+               return SWITCH_STATUS_FALSE;
+       }
+
        if (switch_channel_test_flag(session->channel, CF_HOLD)) {
                return SWITCH_STATUS_SUCCESS;
        }