修改了复制粘贴节点后无法显示参数连接关系的问题

Workbench/Node/INodeJunction.cs

@@ -38,7 +38,12 @@ namespace Serein.Workbench.Node
         /// <returns></returns>
         JunctionControlBase GetJunctionOfArgData(int index)
         {
-            return ArgDataJunction[index];
+            var arr = ArgDataJunction;
+            if (index >= arr.Length)
+            {
+                return null;
+            }
+            return arr[index];
         }
     }
 }

Workbench/Node/Junction/JunctionControlBase.cs

@@ -31,10 +31,10 @@ namespace Serein.Workbench.Node.View
         }
     }
     
-
     public class ParamsArgControl: Shape
     {
 
+
         public ParamsArgControl()
         {
             this.MouseDown += ParamsArg_OnMouseDown; // 增加或删除

Workbench/Node/View/ConnectionControl.cs

@@ -253,7 +253,7 @@ namespace Serein.Workbench.Node.View
         {
             if(ArgIndex > -1)
             {
-                End = EndNode.GetJunctionOfArgData(ArgIndex);
+                End = EndNode.GetJunctionOfArgData(ArgIndex) ?? End;
             }
             (Point startPoint, Point endPoint) = RefreshPoint(Canvas, Start, End);
             BezierLine.UpdatePoints(startPoint, endPoint);