ast: fix error for struct embedding with interface (#13457)

vlib/v/ast/table.v

@@ -1293,14 +1293,7 @@ pub fn (mut t Table) complete_interface_check() {
 		if tsym.kind != .struct_ {
 			continue
 		}
-		info := tsym.info as Struct
 		for _, mut idecl in t.interfaces {
-			if idecl.methods.len > tsym.methods.len {
-				continue
-			}
-			if idecl.fields.len > info.fields.len {
-				continue
-			}
 			if idecl.typ == 0 {
 				continue
 			}

vlib/v/tests/struct_embedding_with_interface_test.v

@@ -0,0 +1,60 @@
+fn test_struct_embedding_with_interface() {
+	mut ll := LinearLayout{}
+	mut lv := ListView{}
+	ll.add(lv)
+	ret := ll.layout()
+
+	println(ret)
+	assert ret.count('ListView') == 2
+}
+
+interface Container {
+mut:
+	layout() string
+}
+
+interface Layoutable {
+	get_pos() (int, int)
+mut:
+	set_pos(int, int)
+}
+
+pub struct LayouterBase {
+mut:
+	layoutables []Layoutable
+}
+
+pub fn (mut lb LayouterBase) add(layoutable Layoutable) {
+	lb.layoutables << layoutable
+}
+
+pub fn (lb LayouterBase) get_pos() (int, int) {
+	return 0, 0
+}
+
+pub fn (mut lb LayouterBase) set_pos(x int, y int) {}
+
+pub struct LinearLayout {
+	LayouterBase
+}
+
+pub fn (mut ll LinearLayout) layout() string {
+	mut output := ''
+	for mut l in ll.layoutables {
+		dump(l.type_name())
+		output += '$l.type_name()\n'
+		if l is Container {
+			dump(l.type_name())
+			output += '$l.type_name()\n'
+		}
+	}
+	return output
+}
+
+pub struct ListView {
+	LayouterBase
+}
+
+pub fn (mut lv ListView) layout() string {
+	return ''
+}