Fix Clang compilation

Already merged in Qt: https://qt.gitorious.org/qt/qt/commit/b82b8bfa811adcf11cb8d07d662fd2b9642deebc

Issue #11611 https://github.com/ariya/phantomjs/pull/11611
REPL returns empty object on enumerating properties on a simple JavaScript type (Number, String, Logical).
We should not to do that.

Issue:
https://github.com/ariya/phantomjs/issues/11622
Merge branch 'master' into r3b-flash