fix bug

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8477 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_ivr_play_say.c

@@ -650,7 +650,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_gentones(switch_core_session_t *sessi
 		}
 
 		if ((write_frame.datalen = (uint32_t) switch_buffer_read_loop(audio_buffer, write_frame.data,
-																	  read_frame->codec->implementation->bytes_per_frame)) <= 0) {
+																	  read_codec->implementation->bytes_per_frame)) <= 0) {
 			break;
 		}