Fix ParseExceptions falling through;

Apparently since when the RequestBroker was added, the logic has been changed,
and the exception no longer comes through PreviewController's try{} block.

src/gui/preview/PreviewController.cpp

@@ -62,16 +62,6 @@ void PreviewController::Update()
 		delete loginWindow;
 		loginWindow = NULL;
 	}
-
-	try
-	{
-		previewModel->Update();
-	}
-	catch (PreviewModelException & e)
-	{
-		Exit();
-		new ErrorMessage("Error", e.what());
-	}
 	if(previewModel->GetDoOpen() && previewModel->GetSave() && previewModel->GetSave()->GetGameSave())
 	{
 		Exit();

src/gui/preview/PreviewModel.cpp

@@ -2,6 +2,7 @@
 #include "PreviewModel.h"
 #include "client/Client.h"
 #include "client/GameSave.h"
+#include "gui/dialogues/ErrorMessage.h"
 #include "PreviewModelException.h"
 
 PreviewModel::PreviewModel():
@@ -174,7 +175,7 @@ void PreviewModel::OnResponseReady(void * object, int identifier)
 			}
 			catch(ParseException &e)
 			{
-				throw PreviewModelException("Save file corrupt or from newer version");
+				new ErrorMessage("Error", e.what());
 			}
 			notifySaveChanged();
 			notifyCommentsPageChanged();