2002-12-23  Morten Welinder  <terra@diku.dk>

	* src/parse-util.c (col_parse, row_parse): Change to return NULL
	in the failure case.  All callers changed.
	(test_col_stuff, test_row_stuff): New functions.
	(parse_util_init) [TEST]: Call them.

2002-12-23  Morten Welinder  <terra@diku.dk>

	* src/parse-util.c (row_parse): Don't allow sign or initial
	white-space.  Don't allow numbers starting with '0'.  Fix
	potential overflow problem on machines wherer long>int.  No need
	to fiddle with errno.
	(cellref_as_string): Simplify using col_name_internal and
	row_name_internal.  (Making it work for larger SHEET_MAX_COLS
	also.)
	(cellref_a1_get, cellpos_parse): Simplify greatly using col_parse
	and row_parse.  (Thus making them work for larger SHEET_MAX_COLS
	also.)