Fix lua lseek command / io lib

lua would not return or set arbitrary file positions
file:seek("set", 0) worked file:seek("cur") worked
but setting an offset or file:seek("end") failed

I tracked this down to a bug checking the return of rb->lseek

on error lseek returns a negative number and returns the file
position otherwise, the function was checking for if(N) instead of
if(N < 0)

Fixed - limited size of lseek to size of signed LuaNumber

Fixed - io:lines() stopped after first line containing only a newline
        instead of returning a blank line and continuing till EOF
        this fixes file:read("*l") as well

Fixed - ssize_t for read() with error checking

Change-Id: Ie859b288fb8f6814f1b3ae30992ecf78f2669de7

0 files changed, 0 insertions, 0 deletions