eth/filters: fix the block range assignment for log filter (#17284)

eth/filters/api.go

@@ -330,15 +330,13 @@ func (api *PublicFilterAPI) GetLogs(ctx context.Context, crit FilterCriteria) ([
 		filter = NewBlockFilter(api.backend, *crit.BlockHash, crit.Addresses, crit.Topics)
 	} else {
 		// Convert the RPC block numbers into internal representations
-		var (
+		begin := rpc.LatestBlockNumber.Int64()
-			begin int64
+		if crit.FromBlock != nil {
-			end   int64
+			begin = crit.FromBlock.Int64()
-		)
-		if crit.FromBlock == nil {
-			begin = int64(rpc.LatestBlockNumber)
 		}
-		if crit.ToBlock == nil {
+		end := rpc.LatestBlockNumber.Int64()
-			end = int64(rpc.LatestBlockNumber)
+		if crit.ToBlock != nil {
+			end = crit.ToBlock.Int64()
 		}
 		// Construct the range filter
 		filter = NewRangeFilter(api.backend, begin, end, crit.Addresses, crit.Topics)