[treat arrays as heap allocatable for the GC
John Meacham <john@repetae.net>**20100721003842
 Ignore-this: 1c640637dde95b8e4abe2f9b6c3b5e1
] hunk ./src/Grin/Devolve.hs 144
+    isNode (TyPtr TyNode) = True
+    isNode (TyPtr TyINode) = True