Should we determine use which ModSqrt

[zyfrank]

pycrypto/zokrates/babyjubjub.py

Line 124 in e0c544a

x = FQ(square_root_mod_prime(int(xsq), JUBJUB_Q))

As we know, an element of Fp may have several ModSqrt, for example 4 of F5 has two: 2, 3. should we determine use which ModSqrt? otherwise this will lead to conflict with other implementation(because they can choose another ModSqrt)

[zyfrank]

What I mean is that ModSqrt can have two roots (or none), maybe we should define use the smaller or bigger?