Generated new code and added initial data handling

BlendFile/DNA/NodeInputString.cs

@@ -17,6 +17,9 @@ namespace BlendFile.DNA {
     public class NodeInputString {
         [DNAFieldAttribute(0, "char", "*string", 1)]
         public char ptr_string;
+        public NodeInputString() {
+            this.ptr_string = default;
+        }
         public NodeInputString(char ptr_string) {
             this.ptr_string = ptr_string;
         }