matrix cannot be null

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut16TagDataEntry.cs

@@ -60,15 +60,13 @@ namespace ImageSharp
         public IccLut16TagDataEntry(float[,] matrix, IccLut[] inputValues, IccClut clutValues, IccLut[] outputValues, IccProfileTag tagSignature)
             : base(IccTypeSignature.Lut16, tagSignature)
         {
+            Guard.NotNull(matrix, nameof(matrix));
             Guard.NotNull(inputValues, nameof(inputValues));
             Guard.NotNull(clutValues, nameof(clutValues));
             Guard.NotNull(outputValues, nameof(outputValues));
 
-            if (matrix != null)
-            {
-                bool is3By3 = matrix.GetLength(0) == 3 && matrix.GetLength(1) == 3;
-                Guard.IsTrue(is3By3, nameof(matrix), "Matrix must have a size of three by three");
-            }
+            bool is3By3 = matrix.GetLength(0) == 3 && matrix.GetLength(1) == 3;
+            Guard.IsTrue(is3By3, nameof(matrix), "Matrix must have a size of three by three");
 
             Guard.IsTrue(this.InputChannelCount == clutValues.InputChannelCount, nameof(clutValues), "Input channel count does not match the CLUT size");
             Guard.IsTrue(this.OutputChannelCount == clutValues.OutputChannelCount, nameof(clutValues), "Output channel count does not match the CLUT size");

src/ImageSharp/MetaData/Profiles/ICC/TagDataEntries/IccLut8TagDataEntry.cs

@@ -60,15 +60,13 @@ namespace ImageSharp
         public IccLut8TagDataEntry(float[,] matrix, IccLut[] inputValues, IccClut clutValues, IccLut[] outputValues, IccProfileTag tagSignature)
             : base(IccTypeSignature.Lut8, tagSignature)
         {
+            Guard.NotNull(matrix, nameof(matrix));
             Guard.NotNull(inputValues, nameof(inputValues));
             Guard.NotNull(clutValues, nameof(clutValues));
             Guard.NotNull(outputValues, nameof(outputValues));
 
-            if (matrix != null)
-            {
-                bool is3By3 = matrix.GetLength(0) == 3 && matrix.GetLength(1) == 3;
-                Guard.IsTrue(is3By3, nameof(matrix), "Matrix must have a size of three by three");
-            }
+            bool is3By3 = matrix.GetLength(0) == 3 && matrix.GetLength(1) == 3;
+            Guard.IsTrue(is3By3, nameof(matrix), "Matrix must have a size of three by three");
 
             Guard.IsTrue(this.InputChannelCount == clutValues.InputChannelCount, nameof(clutValues), "Input channel count does not match the CLUT size");
             Guard.IsTrue(this.OutputChannelCount == clutValues.OutputChannelCount, nameof(clutValues), "Output channel count does not match the CLUT size");