Output to glibconfig.h typedefs for gintptr as the signed integer type

Output to glibconfig.h typedefs for gintptr as the signed integer type

2008-07-28  Tor Lillqvist  <tml@novell.com>

	* configure.in: Output to glibconfig.h typedefs for gintptr as the
	signed integer type that can hold a pointer, and guintptr as the
	corresponding unsigned type. These types are portable equivalents
	to intptr_t and uintptr_t which are not available in all
	compilers.

	For all current platforms, they will presumably end up as the same
	types as gssize and gsize, but in theory size_t can be smaller
	than intptr_t. Also, the intended use case for gintptr and
	guintptr is different from that of gssize and gsize. As the name
	indicates, gintptr is for when one wants an integer type that can
	hold a pointer, and gsize is for when one wants an integer type
	that can hold the value of the sizeof operator.

svn path=/trunk/; revision=7272