Avoid pointer underflow in CopyCharsUnsigned.

include/v8.h

 // Copyright 2012 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 1117 matching lines @@
             int start = 0,
             int length = -1,
             int options = NO_OPTIONS) const;
   // ASCII characters.
   int WriteAscii(char* buffer,
                  int start = 0,
                  int length = -1,
                  int options = NO_OPTIONS) const;
   // One byte characters.
   int WriteOneByte(uint8_t* buffer,
-                            int start = 0,
-                            int length = -1,
-                            int options = NO_OPTIONS) const;
+                   int start = 0,
+                   int length = -1,
+                   int options = NO_OPTIONS) const;
   // UTF-8 encoded characters.
   int WriteUtf8(char* buffer,
                 int length = -1,
                 int* nchars_ref = NULL,
                 int options = NO_OPTIONS) const;
 
   /**
    * A zero length string.
    */
   static v8::Local<v8::String> Empty();
@@ skipping 3678 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_