Fixed recursive decent on empty objects/arrays

pkg/yqlib/operator_multiply_test.go

@@ -13,6 +13,13 @@ var multiplyOperatorScenarios = []expressionScenario{
 			"D0, P[], (!!map)::{a: {also: me}, b: {also: me}}\n",
 		},
 	},
+	{
+		skipDoc:    true,
+		expression: `{} * {"cat":"dog"}`,
+		expected: []string{
+			"D0, P[], (!!map)::cat: dog\n",
+		},
+	},
 	{
 		skipDoc:    true,
 		document:   `{a: {also: me}, b: {also: [1]}}`,