fiddle/function.c: fix memory leak on exception
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45301 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
fiddle/function.c: fix memory leak on exception
exception occurs at argument conversion or the function call.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45301 b2dd03c8-39d4-4d8f-98ff-823fe69b080e