bug 160973 patch by Andrew Schultz <ajschult@eos.ncsu.edu> r=dveditz sr=bryner

fix gtk assertions on installer exit from auto-mode

xpinstall/wizard/unix/src2/nsInstallDlg.cpp

@@ -185,12 +185,9 @@ nsInstallDlg::Next(GtkWidget *aWidget, gpointer aData)
     }
 
     PerformInstall();
-    if (bDLCancel) // set only when download was cancelled
-    {
     // mode auto has no call to gtk_main()
     if (gCtx->opt->mMode == nsXIOptions::MODE_DEFAULT)
          gtk_main_quit();
-    }
     
     gCtx->bMoving = TRUE;
     return;
@@ -898,7 +895,6 @@ nsInstallDlg::ShowCompleteDlg()
     gtk_widget_show_all(completeDlg);
 
     gtk_main();
-    gtk_main_quit();
 }
 
 void