Fixes for re-enabling more MSVC level 4 warnings: courgette/ edition

courgette/disassembler_elf_32.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COURGETTE_DISASSEMBLER_ELF_32_H_
 #define COURGETTE_DISASSEMBLER_ELF_32_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_vector.h"
 #include "courgette/assembly_program.h"
@@ skipping 12 matching lines @@
 // ParseRelocationSection verifies the organization of the ELF
 // relocation table, and ParseRel32RelocsFromSection finds branch
 // targets by looking for relative jump/call opcodes in the particular
 // architecture's machine code.
 class DisassemblerElf32 : public Disassembler {
  public:
   // Different instructions encode the target rva differently.  This
   // class encapsulates this behavior.  public for use in unit tests.
   class TypedRVA {
    public:
-    explicit TypedRVA(RVA rva) : rva_(rva), offset_(-1) {
+    explicit TypedRVA(RVA rva) : rva_(rva), offset_(static_cast<size_t>(-1)) {
     }
 
     virtual ~TypedRVA() { };
 
     RVA rva() {
       return rva_;
     }
 
     RVA relative_target() {
       return relative_target_;
@@ skipping 157 matching lines @@
 
   std::vector<RVA> abs32_locations_;
   ScopedVector<TypedRVA> rel32_locations_;
 
   DISALLOW_COPY_AND_ASSIGN(DisassemblerElf32);
 };
 
 }  // namespace courgette
 
 #endif  // COURGETTE_DISASSEMBLER_ELF_32_H_