henrik.lundin 71e92dc5e8 Avoid overflow in WebRtcSpl_Sqrt
When the input to WebRtcSpl_Sqrt was the maximum negative value
(-2147483648), the calculations would overflow. This is now solved by
nudging this particular input value one step.

BUG=webrtc:5512

Review URL: https://codereview.webrtc.org/1685743003

Cr-Commit-Position: refs/heads/master@{#11631}
2016-02-15 20:38:14 +00:00
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2016-02-15 20:38:14 +00:00