?: Conversion inserts unnecessary casting

[FickoDeLux]

I get this where "SmoothenMinRange" is a const int and "NUD_Percent" is a NummericUpAndDown Control:

NUD_Percent.Value = (_isSharpenTool) ? (decimal)0 : (decimal)SmoothenMinRange;

[AndrewBoklashko]

This duplicates #289.