* ext/dl/cptr.c (dlptr_free), ext/dl/handle.c (dlhandle_free),
  ext/fiddle/handle.c (fiddle_handle_free),
  ext/fiddle/pointer.c (fiddle_ptr_free): fix memory leak.
  based on the patch Heesob Park at [ruby-dev:48021] [Bug #9599].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45291 b2dd03c8-39d4-4d8f-98ff-823fe69b080e