fix traceback when index in addright

cccli/command/right.py

@@ -58,7 +58,7 @@ class Command_addright(TqlCommand):
         if len(self.args) == 4:
             self.args.append(None)
         elif len(self.args) == 5:
-            self.args[5] = int(self.args[5])
+            self.args[4] = int(self.args[4])
         else:
             raise cmdBadArgument()
         # rpc call