[Mono-dev] Patch for fixing binary search

[Duncan Mak]

Hello,

As pointed out by this blog post by Joshua Bloch:

http://googleresearch.blogspot.com/2006/06/extra-extra-read-all-about-it-nearly.html

The current by-the-book implementation of BinarySearch has an integer
overflow bug due to this:

	int mid = (low + high) / 2;

This bug manifests itself when (low + high) > Int32.MaxValue.

Here's a patch for fixing this in Array, Array<T> and ArrayList.

Duncan.
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