extraneous check? also, naming nit.

[bennetyee]

oasis-core/secret-sharing/src/churp/dealer.rs

Line 147 in 3f241f7

let is_zero_xy = bp.coefficient(i, j).unwrap().is_zero();

is_zero_ij? in any case, what is the rationale for needing this coefficient to be non-zero? if it is actually needed, a comment explaining why would be useful.

same extraneous check here:

oasis-core/secret-sharing/src/churp/shareholder.rs

Line 206 in 6dcf9d8

if self.vm.element(i, j).unwrap().is_identity().into() {