* cpplex.c (output_line_command): Remove debugging prints.
	(cpp_output_tokens): Don't write out a zero-length buffer or
	try to see if it has a newline in it.
	(_cpp_expand_to_buffer): Copy the source buffer before pushing.
	(_cpp_read_and_prescan): Move shift-down of pushback bytes to
	the end of the loop.  Use memmove.  Don't read past the end of
	the buffer.  Remove trailing newlines from error messages.

From-SVN: r33180