PR 25708 Use a temporary buffer when parsing module files.

2013-03-27  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/25708
        * module.c (module_locus): Use long for position.
        (module_content): New variable.
        (module_pos): Likewise.
        (prev_character): Remove.
        (bad_module): Free data instead of closing mod file.
        (set_module_locus): Use module_pos.
        (get_module_locus): Likewise.
        (module_char): use buffer rather than stdio file.
        (module_unget_char): Likewise.
        (read_module_to_tmpbuf): New function.
        (gfc_use_module): Call read_module_to_tmpbuf.

From-SVN: r197124