Clamp01 needed for Curve inputs

Clamp01 needed for Curve inputs

Thread failed: System.IndexOutOfRangeException: Index was outside the bounds of the array.
at Den.Tools.Matrices.Matrix.Histogram (System.Int32 resolution, System.Single max, System.Boolean normalize) [0x00049] in Assets\MapMagic\Tools\Matrix\Matrix.cs:2309
at MapMagic.Nodes.MatrixGenerators.Levels200.Generate (MapMagic.Products.TileData data, MapMagic.Products.StopToken stop) [0x0006c] in Assets\MapMagic\Generators\Matrix\Runtime\MatrixModifiers.cs:125

It's caused by Curve. Needs a clamp on input. thanks.