gst/parse/grammar.y (__gst_parse_chain_free): Don't do null checking here, do it...

gst/parse/grammar.y (__gst_parse_chain_free): Don't do null checking here, do it before calling the function.

Original commit message from CVS:
* gst/parse/grammar.y (__gst_parse_chain_free): Don't do null
checking here, do it before calling the function.
Clean up, use for loops instead of while loops while iterating
over lists.