More fixes to plResManager::FindPage() - it appears invalid pages can exist on

the fAllPages list.

Validate each one when the list(set) is walked before operating on it.

MOULOpenSourceClientPlugin/Plasma20/Sources/Plasma/PubUtilLib/plResMgr/plResManager.cpp

@@ -1627,12 +1627,16 @@ plRegistryPageNode* plResManager::FindPage(const plLocation& location) const
 	PageSet::const_iterator it;
 	for (it = fAllPages.begin(); it != fAllPages.end(); it++)
 	{
+		if ((*it)->IsValid()) {
 			const plLocation& pageloc = (*it)->GetPageInfo().GetLocation();
 			if (pageloc == location)
 			{
 				fLastFoundPage = *it;
 				return fLastFoundPage;
 			}
+		} else {
+			hsStatusMessageF("Invalid Page on fAllPages @0x%x state=0x%x\n", (*it), (*it)->GetPageCondition());
+		}
 	}
 
 	return nil;