* cppexp.c (cpp_interpret_integer): Don't force traditional

	numbers to be unsigned.
	* cpplib.c (prepare_directive_trad): Set line number for
	diagnostics.
	* cpptrad.c (scan_out_logical_line): Continue scanning out
	at start of buffer.
	* gcc.c (trad_capable_cpp): Use cc1 always.
f:
	* lang-specs.h: Use cc1 for traditional preprocessing.
testsuite:
	* gcc.dg/cpp/assert_trad1.c, gcc.dg/cpp/assert_trad2.c,
	gcc.dg/cpp/assert_trad3.c, gcc.dg/cpp/defined_trad.c,
	gcc.dg/cpp/hash2.c, gcc.dg/cpp/tr-define.c, gcc.dg/cpp/tr-direct.c,
	gcc.dg/cpp/tr-sign.c, gcc.dg/cpp/tr-str.c, gcc.dg/cpp/uchar-2.c:
	Remove.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@54856 138bc75d-0d04-0410-961f-82ee72b054a4