mPrt              = nsnull; mPrintIsPending   = PR_FALSE;
void DocumentViewerImpl::PrepareToStartLoad(){  mEnableRendering  = PR_TRUE;  mStopped          = PR_FALSE;  mLoaded           = PR_FALSE;  mPrt              = nsnull;  mPrintIsPending   = PR_FALSE;  mPrintDocIsFullyLoaded = PR_FALSE;#ifdef NS_PRINT_PREVIEW  mIsDoingPrintPreview = PR_FALSE;  mPrtPreview          = nsnull;  mOldPrtPreview       = nsnull;#endif#ifdef NS_DEBUG  mDebugFile = nsnull;#endif}