Fixed cppcheck errors

src/crypto.cpp

@@ -93,6 +93,7 @@ void generate_keys(hash& pub, hash& sec)
 	ge_p3_tobytes(pub.h, &point);
 }
 
+// cppcheck-suppress constParameterReference
 void generate_keys_deterministic(hash& pub, hash& sec, const uint8_t* entropy, size_t len)
 {
 	uint32_t counter = 0;

src/stratum_server.cpp

@@ -375,7 +375,7 @@ bool StratumServer::on_submit(StratumClient* client, uint32_t id, const char* jo
 	}
 
 	if (found) {
-		BlockTemplate& block = m_pool->block_template();
+		const BlockTemplate& block = m_pool->block_template();
 		uint64_t height, sidechain_height;
 		difficulty_type mainchain_diff, sidechain_diff;