cgen: fix enum print (#11218)

vlib/v/gen/c/str.v

@@ -92,11 +92,7 @@ fn (mut g Gen) gen_expr_to_string(expr ast.Expr, etype ast.Type) {
 	} else if sym.kind == .none_ {
 		g.write('_SLIT("<none>")')
 	} else if sym.kind == .enum_ {
-		is_var := match expr {
-			ast.SelectorExpr, ast.Ident, ast.CTempVar { true }
-			else { false }
-		}
-		if is_var {
+		if expr !is ast.EnumVal {
 			str_fn_name := g.gen_str_for_type(typ)
 			g.write('${str_fn_name}(')
 			g.enum_expr(expr)

vlib/v/tests/inout/enum_print.out

@@ -3,4 +3,6 @@ yellow
 green
 green
 interp: green
-interp: green
+interp: green
+orange
+orange

vlib/v/tests/inout/enum_print.vv

@@ -7,7 +7,7 @@ enum Color {
 	yellow = 3
 }
 
-struct Aaa{
+struct Aaa {
 	color Color
 }
 
@@ -21,4 +21,6 @@ fn main() {
 	println(a.color)
 	println('interp: ${col}')
 	println('interp: ${a.color}')
+	println((Color.orange))
+	println([Color.orange, Color.green][0])
 }