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  • What about the terminating nul? Commented Feb 20, 2013 at 16:48
  • @FatalError that will be included in size of s1. Commented Feb 20, 2013 at 16:49
  • @Arpit No I don't think it will; only if s2 is shorter than 2, which it isn't in this case. Commented Feb 20, 2013 at 16:50
  • @FatalError Thanks; hopefully fixed! Commented Feb 20, 2013 at 16:52