* proc.c (proc_call): Add gc guard to avoid segfault. The fix is created by Tomoyuki Chikanaga. [Bug #4238][ruby-dev:42963]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30690 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r30601 from trunk into ruby_1_9_2.¶
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30690 b2dd03c8-39d4-4d8f-98ff-823fe69b080e