tests: Add fuzzer initialization (hold ECCVerifyHandle)

src/test/fuzz/script_flags.cpp

@@ -2,8 +2,10 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <pubkey.h>
 #include <script/interpreter.h>
 #include <streams.h>
+#include <util/memory.h>
 #include <version.h>
 
 #include <test/fuzz/fuzz.h>
@@ -11,6 +13,11 @@
 /** Flags that are not forbidden by an assert */
 static bool IsValidFlagCombination(unsigned flags);
 
+void initialize()
+{
+    static const auto verify_handle = MakeUnique<ECCVerifyHandle>();
+}
+
 void test_one_input(const std::vector<uint8_t>& buffer)
 {
     CDataStream ds(buffer, SER_NETWORK, INIT_PROTO_VERSION);