Fix crash if APIInspector::RevealParameter is called for hidden object

* There's nothing to expand for hidden objects so make sure we don't crash or
  expand the wrong item.

qrenderdoc/Code/QRDUtils.cpp

@@ -2125,6 +2125,7 @@ void addStructuredChildren(RDTreeWidgetItem *parent, const SDObject &parentObj)
       name = obj->name;
 
     RDTreeWidgetItem *item = new RDTreeWidgetItem({name, QString()});
+    item->setTag(QVariant::fromValue((void *)obj));
 
     item->setText(1, SDObject2Variant(obj, false));
 

qrenderdoc/Windows/APIInspector.cpp

@@ -93,6 +93,11 @@ void APIInspector::RevealParameter(SDObject *param)
           if(current->GetChild(i) == next)
           {
             current = next;
+
+            // revealing a parameter that wasn't added, bail out now
+            if(i >= parent->childCount() || parent->child((int)i)->tag().value<void *>() != next)
+              return;
+
             item = parent->child((int)i);
             break;
           }