gree/lwf — pull request #45 by yonekawa (2013-12-05 09:32:13+00:00)
Title: Avoid exception at unloadLWF

cache.scripts created if I use foo.lwf.js.
But unloadLWF is called if I use foo.lwf only.

This exception has no problem because it raises in try-catch block.
But I want to avoid detecting exception by Safari's debugger.