Add missing return statement to CheckReturnValue's copy assignment operator.

courgette/memory_allocator.h

 // Copyright (c) 2011 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_MEMORY_ALLOCATOR_H_
 #define COURGETTE_MEMORY_ALLOCATOR_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ skipping 18 matching lines @@
     other.checked_ = true;
   }
 
   CheckReturnValue& operator=(const CheckReturnValue& other) {
     if (this != &other) {
       DCHECK(checked_);
       value_ = other.value_;
       checked_ = other.checked_;
       other.checked_ = true;
     }
+    return *this;
   }
 
   ~CheckReturnValue() {
     DCHECK(checked_);
   }
 
   operator const T&() const {
     checked_ = true;
     return value_;
   }
@@ skipping 448 matching lines @@
  protected:
   T* buffer_;
   size_t size_;  // how much of the buffer we're using.
   size_t alloc_size_;  // how much space we have allocated.
   Allocator alloc_;
 };
 
 }  // namespace courgette
 
 #endif  // COURGETTE_MEMORY_ALLOCATOR_H_