Crash with range check option

Hello Thomas,

Your component is very good, except for one point : InternalRender raises an exception on following line when range check error is activated :

 BGColor:= FFrames[AIndex].Data.Palette[FFrames[AIndex].BackIndex].Color;
   
To have the component working anyway we can add {$R-,$Q-} at the beginning of the unit, but it's not very safe I guess.

Regards
Den