Fix memory leaks in ~Zone and ~Isolate

src/zone.h

Index: src/zone.h
diff --git a/src/zone.h b/src/zone.h
index abb53ad46d3b236096b13155076d3b53894d1f31..96caec0dbe306dcc836f37092596252c50aa1a4e 100644
--- a/src/zone.h
+++ b/src/zone.h
@@ -58,6 +58,8 @@ class Segment;
 
 class Zone {
  public:
+  ~Zone();

[Vitaly Repeshko, 2011/08/16 17:52:32]

Given that the constructor is private it makes sense to have the destructor
private too (if possible).

[Jakob Kummerow, 2011/08/17 08:47:30]

Done.

+
   // Allocate 'size' bytes of memory in the Zone; expands the Zone by
   // allocating new segments of memory on demand using malloc().
   inline void* New(int size);