bignum.c: micro optimization
bignum.c (rb_big_uminus, bigsub_int): use BIGNUM_NEGATE.
internal.h (BIGNUM_NEGATE): simplify negation.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53832 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
bignum.c: micro optimization
bignum.c (rb_big_uminus, bigsub_int): use BIGNUM_NEGATE.
internal.h (BIGNUM_NEGATE): simplify negation.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53832 b2dd03c8-39d4-4d8f-98ff-823fe69b080e