Avoid NRE when running in VB6 when accessing HostApplication

Author: bclothier

Rubberduck.Core/UI/CodeExplorer/Commands/AddComponentCommand.cs

@@ -78,7 +78,7 @@ public void AddComponent(CodeExplorerItemViewModel node, string moduleText)
             string optionCompare = string.Empty;
             using (IHostApplication hostApp = _vbe.HostApplication())
             {
-                optionCompare = hostApp.ApplicationName == "Access" ? "Option Compare Database" :
+                optionCompare = hostApp?.ApplicationName == "Access" ? "Option Compare Database" :
                     string.Empty;
             }