[BUG] dvd+rw-tools compile failure with linux-headers-2.6.23

[Ian Abbott <abbotti@mev.co.uk>]

When building dvd+rw-tools on an "unstable" Gentoo GNU/Linux system with 
Linux headers derived from a 2.6.23 kernel, there are compilation errors 
due to INT_MAX being undefined.  This can be fixed by adding '#include 
<limits.h>' to growisofs.c and transport.hxx, at least in the 
GNU/Linux-specific parts of those files.

The definitions of the CDSL_CURRENT and CDSL_NONE macros changed in the 
2.6.23 kernel sources <linux/cdrom.h>.  They are now defined in terms of 
INT_MAX, whereas previously they were based on casting an unsigned 
integer constant numerically equal to INT_MAX.

<linux/cdrom.h> 2.6.22:

/* Special codes used when specifying changer slots. */
#define CDSL_NONE               ((int) (~0U>>1)-1)
#define CDSL_CURRENT            ((int) (~0U>>1))

<linux/cdrom.h> 2.6.23:

/* Special codes used when specifying changer slots. */
#define CDSL_NONE               (INT_MAX-1)
#define CDSL_CURRENT            INT_MAX

--
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@mev.co.uk>        )=-
-=( Tel: +44 (0)161 477 1898   FAX: +44 (0)161 718 3587         )=-