fuzz: Add missing ECC_Start to descriptor_parse test

src/test/fuzz/descriptor_parse.cpp

@@ -11,7 +11,8 @@
 void initialize()
 {
     static const ECCVerifyHandle verify_handle;
-    SelectParams(CBaseChainParams::REGTEST);
+    ECC_Start();
+    SelectParams(CBaseChainParams::MAIN);
 }
 
 void test_one_input(const std::vector<uint8_t>& buffer)