Merge #276: Typo in shallue_van_de_woestijne description

c33d224 Typo in shallue_van_de_woestijne description (roconnor-blockstream)

Pull request description:

ACKs for top commit:
  real-or-random:
    ACK c33d224

Tree-SHA512: b008b3d64856e4ccf472e97749695bec42e0bf137d7cfe2d8eeed0ba1a27f8fbdafbe20cda550c4931f80a1585c4893ae155e624f3d2ce9e3caf5e955c3dbbf4

Author: real-or-random

src/modules/generator/main_impl.h

@@ -114,7 +114,7 @@ static void shallue_van_de_woestijne(secp256k1_ge* ge, const secp256k1_fe* t) {
        x1d = wd
        x2n = -(x1n + wd)
        x2d = wd
-       x3n = wd^2 + c^2 + t^2
+       x3n = wd^2 + c^2 * t^2
        x3d = (c * t)^2
 
        The joint denominator j = wd * c^2 * t^2, and