math/mp-modsqrt.c: Zero has a square root. Return it correctly.
authorMark Wooding <mdw@distorted.org.uk>
Mon, 22 Dec 2014 20:32:58 +0000 (20:32 +0000)
committerMark Wooding <mdw@distorted.org.uk>
Fri, 27 Feb 2015 21:18:15 +0000 (21:18 +0000)
This causes `find' on prime curves to fail when given the x-coordinate
of a 2-torsion point.


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