Avoid buffer overflow in CEscapeString().
Avoid buffer overflow in CEscapeString().

Fixes #10.

Change-Id: If6836c2af18fe02d78fbdf8194168f5319ecbc98
Reviewed-on: https://code-review.googlesource.com/2241
Reviewed-by: Perry Lorier <d2756efe887c28699f4587ef278926ee3b3bfae5@google.com>
Reviewed-by: Paul Wankadia <62d4e38bb1380f055ec4b899baa75e52af09c5f7@google.com>

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