Only initialize chainstate once during startup

Fixes issue with reindexing corrupted block database

Author: ComputerCraftr

src/init.cpp

@@ -1587,6 +1587,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node, interfaces::BlockA
     LogPrintf("* Using %.1f MiB for in-memory UTXO set (plus up to %.1f MiB of unused mempool space)\n", nCoinCacheUsage * (1.0 / 1024 / 1024), nMempoolSizeMax * (1.0 / 1024 / 1024));
 
     bool fLoaded = false;
+    bool fInitializedChainstate = false;
     while (!fLoaded && !ShutdownRequested()) {
         bool fReset = fReindex;
         auto is_coinsview_empty = [&](CChainState* chainstate) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
@@ -1600,7 +1601,10 @@ bool AppInitMain(const util::Ref& context, NodeContext& node, interfaces::BlockA
             const int64_t load_block_index_start_time = GetTimeMillis();
             try {
                 LOCK(cs_main);
-                chainman.InitializeChainstate(*Assert(node.mempool));
+                if (!fInitializedChainstate) {
+                    chainman.InitializeChainstate(*Assert(node.mempool));
+                    fInitializedChainstate = true;
+                }
                 chainman.m_total_coinstip_cache = nCoinCacheUsage;
                 chainman.m_total_coinsdb_cache = nCoinDBCache;