made tsequtils green again

tests/run/tdumptree.nim

@@ -0,0 +1,24 @@
+discard """
+output: '''StmtList
+  VarSection
+    IdentDefs
+      Ident !"x"
+      nil
+      Call
+        DotExpr
+          Ident !"foo"
+          Ident !"create"
+        IntLit 56'''
+"""
+
+import macros
+
+#emit("type\n  TFoo = object\n    bar: int")
+
+#var f: TFoo
+#f.bar = 5
+#echo(f.bar)
+
+dumpTree:
+  var x = foo.create(56)
+