compiler: fix module alias resolution

vlib/compiler/tests/module_test.v

@@ -1,18 +1,25 @@
 import os
 import time as t
 import crypto.sha256 as s2
-
 import (
 	math
 	log as l
 	crypto.sha512 as s5
 )
 
-fn test_import() {
-	assert os.O_RDONLY == os.O_RDONLY &&
-		t.month_days[0] == t.month_days[0] &&
-		s2.size == s2.size &&
-		math.pi == math.pi &&
-		l.INFO == l.INFO &&
-		s5.size == s5.size
+struct TestAliasInStruct {
+	time t.Time
+}
+
+fn test_import() {
+	assert os.O_RDONLY == os.O_RDONLY && t.month_days[0] == t.month_days[0] && s2.size == s2.size && math.pi == math.pi && l.INFO == l.INFO && s5.size == s5.size
+}
+
+fn test_alias_in_struct_field() {
+	a := TestAliasInStruct{
+		time: t.Time{
+			year: 2020
+		}
+	}
+	assert a.time.year == 2020
 }