gst/gststructure.c: Fix typo in docs and re-wrap docs blurb to not exceed 80 chars/line.

Original commit message from CVS:
* gst/gststructure.c:
Fix typo in docs and re-wrap docs blurb to not exceed 80 chars/line.
* gst/gstvalue.h:
Expand on the difference between arrays and lists as we use them.
3 files changed