checker: small cleanup of commit edc6c9e

vlib/v/checker/checker.v

@@ -3708,8 +3708,9 @@ pub fn (mut c Checker) enum_val(mut node ast.EnumVal) ast.Type {
 				c.error('unknown enum `$node.enum_name` (type_idx=0)', node.pos)
 				return ast.void_type
 			}
-		} else {
-			// if module prefix specified enum name given
+		}
+		if typ_idx == 0 {
+			// the actual type is still unknown, produce an error, instead of panic:
 			c.error('unknown enum `$node.enum_name` (type_idx=0)', node.pos)
 			return ast.void_type
 		}

vlib/v/checker/tests/enum_error_module.out

@@ -1,7 +1,6 @@
-vlib/v/checker/tests/enum_error_module.vv:5:13: error: unknown enum `missing_enum.ColoList` (type_idx=0)
+vlib/v/checker/tests/enum_error_module.vv:4:12: error: unknown enum `time.NonExistingEnum` (type_idx=0)
+    2 | 
     3 | fn main() {
-    4 |     mut c := me.Color{
-    5 |         color: me.ColoList.black
-      |                   ~~~~~~~~~~~~~~
-    6 |     }
-    7 |     println(c)
+    4 |     _ := time.NonExistingEnum.black
+      |               ~~~~~~~~~~~~~~~~~~~~~
+    5 | }

vlib/v/checker/tests/enum_error_module.vv

@@ -1,8 +1,5 @@
-import missing_enum as me
+import time
 
 fn main() {
-	mut c := me.Color{
-		color: me.ColoList.black
-	}
-	println(c)
+	_ := time.NonExistingEnum.black
 }

vlib/v/checker/tests/modules/missing_enum.out

@@ -1,5 +0,0 @@
-vlib/v/checker/tests/modules/missing_enum/main.v:1:1: error: project must include a `main` module or be a shared library (compile with `v -shared`)
-    1 | module missing_enum
-      | ^
-    2 | 
-    3 | pub enum ColorList {

vlib/v/checker/tests/modules/missing_enum/main.v

@@ -1,12 +0,0 @@
-module missing_enum
-
-pub enum ColorList {
-	red
-	blue
-	green
-	black
-}
-
-pub struct Color {
-	color ColorList
-}