Original commit message from CVS:
* gst/gstindex.c: (gst_index_entry_free):
* gst/gstindex.h:
Don't free key strings which we don't own. Fixes crash in
gst_index_entry_free() (#522741).
* tests/check/Makefile.am:
* tests/check/gst/.cvsignore:
* tests/check/gst/gstindex.c: (test_index_entries),
(gst_index_suite), (gst_index):
Add unit test for the above.
