Update store.go

Revert to SetSync for saveABCIResponses() as per Ethan's feedback

state/store.go

@@ -149,7 +149,7 @@ func LoadABCIResponses(db dbm.DB, height int64) (*ABCIResponses, error) {
 // This is useful in case we crash after app.Commit and before s.Save().
 // Responses are indexed by height so they can also be loaded later to produce Merkle proofs.
 func saveABCIResponses(db dbm.DB, height int64, abciResponses *ABCIResponses) {
-	db.Set(calcABCIResponsesKey(height), abciResponses.Bytes())
+	db.SetSync(calcABCIResponsesKey(height), abciResponses.Bytes())
 }
 
 //-----------------------------------------------------------------------------