don't allow gc's during script hooks if CAUTIOUS_SCRIPTHOOK is defined (which it is, by default.) Should help with stability until we can fix the real problems. Use JSVAL_ macros instead of JSD_* calls in jsdValue::GetJSType method, avoiding two c++ frames per call. git-svn-id: svn://10.0.0.236/trunk@101912 18797224-902f-48f8-a5cc-f745e15eee43