Fix a couple cast errors

src/deoptimizer.cc

 // Copyright 2010 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 291 matching lines @@
     eager_deoptimization_entry_code_->Free(EXECUTABLE);
     eager_deoptimization_entry_code_ = NULL;
   }
   if (lazy_deoptimization_entry_code_ != NULL) {
     lazy_deoptimization_entry_code_->Free(EXECUTABLE);
     lazy_deoptimization_entry_code_ = NULL;
   }
 }
 
 
-unsigned Deoptimizer::GetOutputInfo(DeoptimizationOutputData* data,
-                                    unsigned id,
-                                    SharedFunctionInfo* shared) {
+int Deoptimizer::GetOutputInfo(DeoptimizationOutputData* data,
+                               unsigned id,
+                               SharedFunctionInfo* shared) {
   // TODO(kasperl): For now, we do a simple linear search for the PC
   // offset associated with the given node id. This should probably be
   // changed to a binary search.
   int length = data->DeoptPoints();
   Smi* smi_id = Smi::FromInt(id);
   for (int i = 0; i < length; i++) {
     if (data->AstId(i) == smi_id) {
       return data->PcAndState(i)->value();
     }
   }
@@ skipping 813 matching lines @@
                           Deoptimizer::HandleWeakDeoptimizedCode);
 }
 
 
 DeoptimizingCodeListNode::~DeoptimizingCodeListNode() {
   GlobalHandles::Destroy(reinterpret_cast<Object**>(code_.location()));
 }
 
 
 } }  // namespace v8::internal