proc.c: check if callable
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66769 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
proc.c: check if callable
Method, or callable object. [ruby-core:90591] [Bug #15428]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66769 b2dd03c8-39d4-4d8f-98ff-823fe69b080e