add interval to file handles for streams

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@6473 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_module_interfaces.h

@@ -279,6 +279,7 @@ struct switch_file_handle {
 	/*! pre-buffer x bytes for streams */
 	uint32_t prebuf;
 	/*! private data for the format module to store handle specific info */
+	uint32_t interval;
 	void *private_info;
 	char *handler;
 	int64_t pos;