parser: C enums + another enum simplification

vlib/compiler/struct.v

@@ -37,11 +37,12 @@ fn (p mut Parser) struct_decl() {
 	}
 	is_c := name == 'C' && p.tok == .dot
 	if is_c {
+		/*
 		if !p.pref.building_v && !p.fileis('vlib') {
 			p.warn('Virtual C structs will soon be removed from the language' +
 			'\ndefine the C structs and functions in V')
 		}
-				
+		*/
 		p.check(.dot)
 		name = p.check_name()
 		cat = .c_struct
@@ -264,6 +265,7 @@ fn (p mut Parser) struct_init(typ string) string {
 			p.gen_struct_field_init(field)
 			p.check(.colon)
 			p.fspace()
+			p.expected_type = f.typ
 			p.check_types(p.bool_expression(),  f.typ)
 			if p.tok == .comma {
 				p.next()