* c-common.c (parse_in): Make a cpp_reader *.
        * cppfiles.c (_cpp_fake_include): Remove.
        * cpphash.h: Similarly.
        * cpplib.c (do_line): Don't call _cpp_fake_include.  A valid
        #line always creates a callback; FC_RENAME if there are no
        #line flags.
        * fix-header.c (read_scan_file): cpp_push_buffer cannot fail.
        The first EOF must be our get_char buffer.

From-SVN: r38101