Improve error reporting, return when the preprocessor fails. Add a verbose

Improve error reporting, return when the preprocessor fails. Add a verbose

2007-12-27  Johan Dahlin  <johan@gnome.org>

	* src/scanner.c: (g_igenerator_parse_macros),
	(g_igenerator_start_preprocessor), (g_igenerator_set_verbose),
	(main):
	* src/scanner.h:
	* src/scannerparser.y:
	* tests/parser/Makefile.am:

	Improve error reporting, return when the preprocessor fails.
	Add a verbose parameter, to aid debugging.
	Revert to using a temporary file to communicate between the
	preprocessor and the parser, because we need to wait for
	the exit code from the pre-processor before starting to parse.

svn path=/trunk/; revision=88