Generated new code and added initial data handling

BlendFile/DNA/bNodeInstanceKey.cs

@@ -17,6 +17,9 @@ namespace BlendFile.DNA {
     public struct bNodeInstanceKey {
         [DNAFieldAttribute(0, "int", "value", 4)]
         public int value;
+        public bNodeInstanceKey() {
+            this.value = default;
+        }
         public bNodeInstanceKey(int value) {
             this.value = value;
         }