Tracker (InfoWindow): small memory leak fix

In the case of a broken symlink, a Model object was leaked when trying
to get the icon of the target.

CID 5844.

src/kits/tracker/InfoWindow.cpp

@@ -851,6 +851,8 @@ AttributeView::AttributeView(BRect rect, Model *model)
 		if (resolvedModel->InitCheck() == B_OK)
 			fIconModel = resolvedModel;
 		// broken link, just show the symlink
+		else
+			delete resolvedModel;
 	}
 
 	// Create the rect for displaying the icon