fix broken regerror (typo) and missing message

[musl] / src / stdlib / strtoul.c

#include <stdlib.h>
#include <inttypes.h>
#include <errno.h>
#include <limits.h>

unsigned long strtoul(const char *s, char **p, int base)
{
        intmax_t x;
        if (sizeof(intmax_t) == sizeof(long))
                return strtoumax(s, p, base);
        x = strtoimax(s, p, base);
        if (-x > ULONG_MAX || x > ULONG_MAX) {
                errno = ERANGE;
                return ULONG_MAX;
        }
        return x;
}