Move mempool nullptr Assert out of LoadChainstate

src/init.cpp

@@ -1421,7 +1421,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
         const int64_t load_block_index_start_time = GetTimeMillis();
         auto rv = LoadChainstate(fReset,
                                  chainman,
-                                 node.mempool.get(),
+                                 Assert(node.mempool.get()),
                                  fPruneMode,
                                  chainparams,
                                  fReindexChainState,

src/node/chainstate.cpp

@@ -31,7 +31,7 @@ std::optional<ChainstateLoadingError> LoadChainstate(bool fReset,
     do {
         try {
             LOCK(cs_main);
-            chainman.InitializeChainstate(Assert(mempool));
+            chainman.InitializeChainstate(mempool);
             chainman.m_total_coinstip_cache = nCoinCacheUsage;
             chainman.m_total_coinsdb_cache = nCoinDBCache;