Merge #986: tests: remove secp256k1_fe_verify from tests.c and modify _fe_from_storage to call _fe_verify

d439937 tests: remove `secp256k1_fe_verify` from tests.c and modify `secp256k1_fe_from_storage` to call `secp256k1_fe_verify` (siv2r)

Pull request description:

ACKs for top commit:
  roconnor-blockstream:
    utACK d439937 diff looks correct, I also didn't run the tests locally.
  real-or-random:
    utACK d439937 diff looks correct, I didn't run the tests locally
  jonasnick:
    ACK d439937 ran tests with `--enable-coverage`

Tree-SHA512: c3c9ecf8e9b7dfdcd1144ddcf8bcc637996c699dbd0fc6223e6186d082908728468fa276b09c6f344e036ca05f54432dde6366a83eb39f915a334164faadd556

Author: jonasnick

src/field_10x26_impl.h

@@ -1162,6 +1162,7 @@ static SECP256K1_INLINE void secp256k1_fe_from_storage(secp256k1_fe *r, const se
 #ifdef VERIFY
     r->magnitude = 1;
     r->normalized = 1;
+    secp256k1_fe_verify(r);
 #endif
 }
 

src/field_5x52_impl.h

@@ -496,6 +496,7 @@ static SECP256K1_INLINE void secp256k1_fe_from_storage(secp256k1_fe *r, const se
 #ifdef VERIFY
     r->magnitude = 1;
     r->normalized = 1;
+    secp256k1_fe_verify(r);
 #endif
 }
 

src/tests.c

@@ -3435,8 +3435,6 @@ void test_pre_g_table(const secp256k1_ge_storage * pre_g, size_t n) {
     CHECK(0 < n);
 
     secp256k1_ge_from_storage(&p, &pre_g[0]);
-    secp256k1_fe_verify(&p.x);
-    secp256k1_fe_verify(&p.y);
     CHECK(secp256k1_ge_is_valid_var(&p));
 
     secp256k1_gej_set_ge(&g2, &p);
@@ -3449,8 +3447,6 @@ void test_pre_g_table(const secp256k1_ge_storage * pre_g, size_t n) {
         CHECK(!secp256k1_fe_normalizes_to_zero_var(&dpx) || !secp256k1_fe_normalizes_to_zero_var(&dpy));
 
         secp256k1_ge_from_storage(&q, &pre_g[i]);
-        secp256k1_fe_verify(&q.x);
-        secp256k1_fe_verify(&q.y);
         CHECK(secp256k1_ge_is_valid_var(&q));
 
         secp256k1_fe_negate(&dqx, &q.x, 1); secp256k1_fe_add(&dqx, &gg.x); secp256k1_fe_normalize_weak(&dqx);