fix small issue

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7804 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_ivr_async.c

@@ -519,6 +519,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_eavesdrop_session(switch_core_session
 								   SWITCH_CODEC_FLAG_ENCODE | SWITCH_CODEC_FLAG_DECODE, 
 								   NULL, switch_core_session_get_pool(session)) != SWITCH_STATUS_SUCCESS) {
 			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Cannot init codec\n");
+			switch_core_session_rwunlock(tsession);
 			return status;
 		}