[Asterisk-bsd] zaptel build fails on 7-current

[Mark Ackroyd]

> gendigits.c:4:19: stdio.h: No such file or directory
> gendigits.c:5:18: math.h: No such file or directory
> gendigits.c:6:20: string.h: No such file or directory
> gendigits.c:7:20: unistd.h: No such file or directory
> gendigits.c:8:20: stdlib.h: No such file or directory
> gendigits.c:153: error: `stderr' undeclared (first use in this function)
> *** Error code 1

stderr would have been in the stdio libraries. Which on your dump looks like
it can't find. 

Wrong paths? maybe? 

Mark