* src/iso2022.c(_vte_iso2022_process): free the temporary array.
* src/matcher.c(_vte_matcher_free_params_array): add.
* src/vte.c: use _vte_matcher_free_params_array instead of the local copy,
	which is removed.
* src/interpret.c, src/table.c, src/trie.c: use _vte_matcher_free_params_array
	to free parameter arrays instead of g_value_array_free, which doesn't
	take care of the pointer values.
* src/vte.c(vte_sequence_handler_set_title_internal): only attempt to close
	the conversion descriptor if it was opened successfully.
* src/vteapp.c: add the -k option to spin after gtk_main() returns.
* src/vtefc.c: make copies of patterns with FcPatternDuplicate so that we know
	where all of the returned patterns came from.
* src/vtexft.c(_vte_xft_font_for_char): set the item in the pattern array to
	NULL if we successfully opened a font using the pattern.