Allow quicker shutdowns during LoadBlockIndex()

src/init.cpp

@@ -1468,6 +1468,7 @@ bool AppInitMain()
                 // Note that it also sets fReindex based on the disk flag!
                 // From here on out fReindex and fReset mean something different!
                 if (!LoadBlockIndex(chainparams)) {
+                    if (ShutdownRequested()) break;
                     strLoadError = _("Error loading block database");
                     break;
                 }