FS-7789 [mod_av] Fixed issue with audio dropping out partway through recordings

This fixes an issue with mod_av where audio was not included for the entire
duration of a recording initiated by something other than the record_av app.

src/mod/applications/mod_av/avformat.c

@@ -1712,7 +1712,6 @@ static switch_status_t av_file_write(switch_file_handle_t *handle, void *data, s
 			}
 		}
 
-		break;
 	}