libdecnumber/

	* decNumber.h (decNumberNegate): Remove.
gcc/
	* dfp.c (decimal_to_decnumber): Do not use decNumberNegate to
	negate dn -- manipulate it directly.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114922 138bc75d-0d04-0410-961f-82ee72b054a4