maybe-uninit warning in tests.c

[elichai]

With gcc-10 under -O3 I get:

src/tests.c: In function ‘test_ecmult_multi_batch_single.constprop’:
src/tests.c:2716:9: warning: ‘sc’ may be used uninitialized in this function [-Wmaybe-uninitialized]
 2716 |     *sc = data->sc[idx];
      |     ~~~~^~~~~~~~~~~~~~~
src/tests.c:2717:9: warning: ‘pt’ may be used uninitialized in this function [-Wmaybe-uninitialized]
 2717 |     *pt = data->pt[idx];
      |     ~~~~^~~~~~~~~~~~~~~
src/tests.c:2717:9: warning: ‘*((void *)&pt+16)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
src/tests.c:2717:9: warning: ‘pt.x.n[4]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
src/tests.c:2717:9: warning: ‘*((void *)&pt+40)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
src/tests.c:2717:9: warning: ‘*((void *)&pt+48)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
src/tests.c:2717:9: warning: ‘*((void *)&pt+64)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
src/tests.c:2717:9: warning: ‘pt.y.n[4]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
src/tests.c:2717:9: warning: ‘*((void *)&pt+88)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
src/tests.c:2717:9: warning: ‘pt.infinity’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  CCLD     tests

[real-or-random]

These are indeed not initialized:
https://github.com/bitcoin-core/secp256k1/blob/master/src/tests.c#L2970-L2971
Also I don't get why this needs to be an array of size 32, maybe copy/paste mistake from the function one above.