eth/tracers: fix lint

Signed-off-by: jsvisa <delweng@gmail.com>

Author: jsvisa

eth/tracers/native/call_flat.go

@@ -296,7 +296,7 @@ func newFlatCreate(input *callFrame) *flatCallFrame {
 	return &flatCallFrame{
 		Type: strings.ToLower(vm.CREATE.String()),
 		Action: flatCallAction{
-			CreateType: strings.ToLower(vm.OpCode(input.Type).String()),
+			CreateType: strings.ToLower(input.Type.String()),
 			From:       &input.From,
 			Gas:        &input.Gas,
 			Value:      input.Value,