use a more-correct integer type, and silence 64-bit warnings as a bonus

[musl] / src / string / wcsncpy.c

#include <wchar.h>

wchar_t *wcsncpy(wchar_t *d, const wchar_t *s, size_t n)
{
        wchar_t *a = d;
        while (n && (*d++ = *s++)) n--;
        wmemset(d, 0, n);
        return a;
}