fix padding string formats to width in wide printf variants
fix padding string formats to width in wide printf variants

the idiom fprintf(f, "%.*s", n, "") was wrongly used in vfwprintf as a
means of producing n spaces; instead it produces no output. the
correct form is fprintf(f, "%*s", n, ""), using width instead of
precision, since for %s the later is a maximum rather than a minimum.

chardi/musl,chardi/musl,chardi/musl