Rubberstamped by Alexey Proskuryakov.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj: Disable
        the "potentially uninitialized variable" warning for grammar.cpp, as
        it seems to be incorrect. yylval gets initialized by the lexer, but
        MSVC doesn't seem to understand this.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@31861 268f45cc-cd09-0410-ab3c-d52691b4dbfc