[vala/0.50] libvaladoc: Correctly retrieve value for Api.Class.is_compact

[Rico Tzschichholz <ricotz src gnome org>]

commit 2fbb3b1011526b5e0b6784389b94a0a68d3edd73
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Jan 19 21:56:50 2021 +0100

    libvaladoc: Correctly retrieve value for Api.Class.is_compact

 libvaladoc/api/class.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libvaladoc/api/class.vala b/libvaladoc/api/class.vala
index f0fe7b7c5..667565bbc 100644
--- a/libvaladoc/api/class.vala
+++ b/libvaladoc/api/class.vala
@@ -265,7 +265,7 @@ public class Valadoc.Api.Class : TypeSymbol {
 
        public bool is_compact {
                get {
-                       return base_type == null && get_attribute ("Compact") != null;
+                       return ((Vala.Class) data).is_compact;
                }
        }