check for utf8_decode errors (#327)

utf8_decode() may return an errors, in which case the returned codepoint
might be garbage. the issue can be tested by adding the following to
`image-info` which produces invalid utf8 sequences:

	base64 -d << EOF
	9JCAgPSQgIH0kICC9JCAg/SQgIT0kICF9JCAhvSQgIf0kICI9JCAifSQgIr0kICL9JCAjPSQgI30
	kICO9JCAj/SQgJD0kICR9JCAkvSQgJP0kICU9JCAlfSQgJb0kICX9JCAmPSQgJn0kICa9JCAm/SQ
	gJz0kICd9JCAnvSQgJ8=
	EOF

on my system, this leads to the statusbar being filled with empty boxes.

check for returned error and skip the iteration.

Reviewed-on: https://codeberg.org/nsxiv/nsxiv/pulls/327
Reviewed-by: Berke Kocaoğlu <berke.kocaoglu@metu.edu.tr>

0 files changed, 0 insertions, 0 deletions