dfc doesn't displays unicode names properly

[nesthib]

It looks like dfc has issues determining unicode strings' length. As /dev/sdXY name are ascii only, this is only visible, for example, when folders are mounted with the "bind" option that include non ascii characters in their name. Although the name is displayed properly, each non ascii character (e.g. "é") is counted as more than one character. This causes the "(=) USED FREE (-)" bar not to be aligned anymore for the lines with these characters.