re PR fortran/40008 (F2008: Add NEWUNIT= for OPEN statement)

2009-06-07  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/40008
	* libgfortran.h: Define IOPARM_OPEN_HAS_NEWUNIT.
	* io/open.c (st_open): Don't error on negative unit number if NEWUNIT
	was specified. If NEWUNIT is specified, call new function to get the
	unique unit number and assign it.
	* io/io.h (st_parameter_open): Add pointer to newunit.  Add prototype for
	next_available_newunit. Add prototype for new function,
	get_unique_unit_number.
	* io/unit.c: Declare next_available_newunit. Define the first newunit
	number. (init_units): Initialize next_available_unit.
	(get_unique_unit_number): New function. Fix whitespace and comments.
	* io/transfer.c (data_transfer_init): Update error message to not be
	specific to OPEN statements.

From-SVN: r148253