[vala/staging] vala: Break possible endless loop in SymbolResolver.get_type_for_struct()

[Rico Tzschichholz <ricotz src gnome org>]

commit aecfc1fbf427f41aa2fe33cdbd3d111c90385a1f
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Nov 28 17:49:53 2018 +0100

    vala: Break possible endless loop in SymbolResolver.get_type_for_struct()
    
    Required to deal with invalid code containing base struct cycles.
    
    Fixes https://gitlab.gnome.org/GNOME/vala/issues/444

 vala/valasymbolresolver.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/vala/valasymbolresolver.vala b/vala/valasymbolresolver.vala
index 8bbd63323..0ec273a8b 100644
--- a/vala/valasymbolresolver.vala
+++ b/vala/valasymbolresolver.vala
@@ -324,7 +324,7 @@ public class Vala.SymbolResolver : CodeVisitor {
        }
 
        DataType get_type_for_struct (Struct st, Struct base_struct) {
-               if (st.base_type != null) {
+               if (st != base_struct && st.base_type != null) {
                        // make sure that base type is resolved
 
                        if (current_scope == st.scope) {