Original commit message from CVS:
* gst/base/gstbasesrc.c: (gst_base_src_class_init),
(gst_base_src_init), (gst_base_src_default_newsegment),
(gst_base_src_newsegment), (gst_base_src_do_seek),
(gst_base_src_loop), (gst_base_src_start):
* gst/base/gstbasesrc.h:
Make the newsegment event customizable by subclasses.