Change the signature for StrNDup to match the implementation. This

mismatch causes problems if attempting to build d8 with readline
support.

Review URL: http://codereview.chromium.org/414033

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3342 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/allocation.h

@@ -124,7 +124,7 @@ static void DeleteArray(T* array) {
 // and StrNDup uses new and calls the FatalProcessOutOfMemory handler
 // if allocation fails.
 char* StrDup(const char* str);
-char* StrNDup(const char* str, size_t n);
+char* StrNDup(const char* str, int n);
 
 
 // Allocation policy for allocating in the C free store using malloc