2006-04-22 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/20257
* io/io.h: Add prototypes for get_internal_unit and free_internal_unit.
* io/unit.c (get_internal_unit): Initialize unit number, not zero.
(free_internal_unit): New function to consolidate freeing memory.
(get_unit): Initialize internal_unit_desc to NULL when unit is
external.
* io/unix.c (mem_close): Check for not NULL before freeing memory.
* io/transfer.c (read_block): Reset bytes_left and skip error if unit
is preconnected and default record length is reached.
(read_block_direct): Ditto.
(write_block): Ditto.
(write_buf): Ditto.
(data_transfer_init): Only flush if not internal unit.
(finalize_transfer): Ditto and delete code to free memory used by
internal units.
(st_read_done): Use new function - free_internal_unit.
(st_write_done): Use new function - free_internal unit.
From-SVN: r113190
