[1.187.204] Missing <DisplayName> tag in cubeblock definition causes crash

version 1.187.204 default

Issue: If displayname tag is missing in cubeblock definition there is a crash to desktop if you try and type any alpha numeric character into the block menu search field.

STR

1. create a mod with one block or remove the <DisplayName>BlockName</DisplayName> tag from a block definition.

2. load up any world or new empty world.

3. open block menu with 'g' and click on search box, and type a character.

Observe crash as soon as you type a character.

2018-09-03 12:30:13.233 - Thread: 1 -> Exception occured: System.NullReferenceException: Object reference not set to an instance of an object. at Sandbox.Game.Gui.MySearchByStringCondition.MatchesCondition(MyDefinitionBase itemId) at Sandbox.Game.Gui.MyGuiScreenToolbarConfigBase.AddCubeDefinitionsToBlocks(IMySearchCondition searchCondition) at Sandbox.Game.Gui.MyGuiScreenToolbarConfigBase.UpdateGridBlocksBySearchCondition(IMySearchCondition searchCondition) at Sandbox.Graphics.GUI.MyGuiControlTextbox.OnTextChanged() at Sandbox.Graphics.GUI.MyGuiControlTextbox.InsertChar(Boolean conpositionEnd, Char character) at Sandbox.Graphics.GUI.MyGuiControlTextbox.HandleTextInputBuffered(MyGuiControlBase& ret) at Sandbox.Graphics.GUI.MyGuiControlTextbox.HandleInput() at Sandbox.Graphics.GUI.MyGuiScreenBase.HandleControlsInput(Boolean receivedFocusInThisUpdate) at Sandbox.Graphics.GUI.MyGuiScreenBase.HandleInput(Boolean receivedFocusInThisUpdate) at Sandbox.Game.Gui.MyGuiScreenToolbarConfigBase.HandleInput(Boolean receivedFocusInThisUpdate) at Sandbox.Graphics.GUI.MyScreenManager.HandleInput() at Sandbox.Graphics.GUI.MyDX9Gui.HandleInput() at Sandbox.MySandboxGame.Update() at Sandbox.Engine.Platform.Game.UpdateInternal() at Sandbox.Engine.Platform.Game.RunSingleFrame() at Sandbox.Engine.Platform.FixedLoop.<>c__DisplayClass1.<Run>b__0() at Sandbox.Engine.Platform.GenericLoop.Run(VoidAction tickCallback) at Sandbox.Engine.Platform.Game.RunLoop() at Sandbox.MySandboxGame.Run(Boolean customRenderLoop, Action disposeSplashScreen) at SpaceEngineers.MyProgram.Main(String[] args)