Reviewed by Eric Seidel.

        There is no new test because this cannot be tested deterministically.
        I've not been able to cause a crash at all in the test framework, but
        I have verified that this is happening in the wild and that the patch
        fixes the likely cause in the debugger.

        * loader/TextResourceDecoder.cpp: careful not to iterate off the end
          of our input buffer looking for the end of the comment.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@44865 268f45cc-cd09-0410-ab3c-d52691b4dbfc