Changed statement ZoneList to a ZoneChunkList

src/effects.h

Index: src/effects.h
diff --git a/src/effects.h b/src/effects.h
index f8b1bd9b2f25695847090a204c4a75e46703445f..601c5edc4a171d26693bee1eac1d864fb8016042 100644
--- a/src/effects.h
+++ b/src/effects.h
@@ -275,7 +275,7 @@ class NestedEffectsBase {
   bool Insert(Var var, Locator* locator);
 
  private:
-  struct Node: ZoneObject {
+  struct Node : ZoneObject {
     Zone* zone;
     Effects<Var, kNoVar> effects;
     Node* previous;