Ruby » Ruby master

math.c: check domain of base argument

• math.c (math_log): check domain of base argument too. raises
  Math::DomainError instead of returning NaN if the base is less
  than 0, and returns NaN instead of -infinity if both of two
  arguments are 0. [ruby-core:62309] [Bug #9797]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45795 b2dd03c8-39d4-4d8f-98ff-823fe69b080e