deps: fix sign-compare warning in ncrypto

PR-URL: #54624
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>

deps/ncrypto/ncrypto.cc

@@ -1194,7 +1194,7 @@ DataPointer DHPointer::computeSecret(const BignumPointer& peer) const {
 
  // The size of the computed key can be smaller than the size of the DH key.
  // We want to make sure that the key is correctly padded.
- if (size < dp.size()) {
+ if (static_cast<size_t>(size) < dp.size()) {
  const size_t padding = dp.size() - size;
  uint8_t* data = static_cast<uint8_t*>(dp.get());
  memmove(data + padding, data, size);