[PMC] Fixed an unused return value compiler warning about the Parrot_io_open() call in StringHandle's open() method.
[PMC] Fixed an unused return value compiler warning about the Parrot_io_open()
call in StringHandle's open() method.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@39782 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot