Make newer GCCs happier: Fixed NULL vs. 0 confusion.

src/mark-compact.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2666 matching lines @@
     ASSERT(!MarkCompactCollector::IsOnEvacuationCandidate(*slot));
   }
 }
 
 
 static inline void UpdateSlot(ObjectVisitor* v,
                               SlotsBuffer::SlotType slot_type,
                               Address addr) {
   switch (slot_type) {
     case SlotsBuffer::CODE_TARGET_SLOT: {
-      RelocInfo rinfo(addr, RelocInfo::CODE_TARGET, NULL, NULL);
+      RelocInfo rinfo(addr, RelocInfo::CODE_TARGET, 0, NULL);
       rinfo.Visit(v);
       break;
     }
     case SlotsBuffer::CODE_ENTRY_SLOT: {
       v->VisitCodeEntry(addr);
       break;
     }
     case SlotsBuffer::RELOCATED_CODE_OBJECT: {
       HeapObject* obj = HeapObject::FromAddress(addr);
       Code::cast(obj)->CodeIterateBody(v);
       break;
     }
     case SlotsBuffer::DEBUG_TARGET_SLOT: {
-      RelocInfo rinfo(addr, RelocInfo::DEBUG_BREAK_SLOT, NULL, NULL);
+      RelocInfo rinfo(addr, RelocInfo::DEBUG_BREAK_SLOT, 0, NULL);
       if (rinfo.IsPatchedDebugBreakSlotSequence()) rinfo.Visit(v);
       break;
     }
     case SlotsBuffer::JS_RETURN_SLOT: {
-      RelocInfo rinfo(addr, RelocInfo::JS_RETURN, NULL, NULL);
+      RelocInfo rinfo(addr, RelocInfo::JS_RETURN, 0, NULL);
       if (rinfo.IsPatchedReturnSequence()) rinfo.Visit(v);
       break;
     }
     default:
       UNREACHABLE();
       break;
   }
 }
 
 
@@ skipping 900 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal