Ruby » Ruby master

numeric.c: allow nil as rounding mode option

• numeric.c (rb_num_get_rounding_option): allow nil same as the
  default behavior, per [ruby-core:77961]. [Bug #12548]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57130 b2dd03c8-39d4-4d8f-98ff-823fe69b080e