Avoid some crashes when running without snapshots.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index e124171032798a7920b8f9a19395ab14b108c72f..a9b773225eb8f818845d19a3f350a0027b1477f8 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1130,18 +1130,14 @@ class HeapObject: public Object {
     HeapObjectPrint(stdout);
   }
   void HeapObjectPrint(FILE* out);
+  void PrintHeader(FILE* out, const char* id);
 #endif
+
 #ifdef DEBUG
   void HeapObjectVerify();
   inline void VerifyObjectField(int offset);
   inline void VerifySmiField(int offset);
-#endif
-
-#ifdef OBJECT_PRINT
-  void PrintHeader(FILE* out, const char* id);
-#endif
 
-#ifdef DEBUG
   // Verify a pointer is a valid HeapObject pointer that points to object
   // areas in the heap.
   static void VerifyHeapPointer(Object* p);