[vala/0.40] girparser: Skip possible docs in transparent union

[Rico Tzschichholz <ricotz src gnome org>]

commit 49083f1629f89f4be5233aa3768a16b2a22f3361
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Dec 5 07:57:36 2018 +0100

    girparser: Skip possible docs in transparent union
    
    See https://gitlab.gnome.org/GNOME/gobject-introspection/merge_requests/75

 vala/valagirparser.vala | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/vala/valagirparser.vala b/vala/valagirparser.vala
index 897832764..8f96d46d1 100644
--- a/vala/valagirparser.vala
+++ b/vala/valagirparser.vala
@@ -3439,6 +3439,8 @@ public class Vala.GirParser : CodeVisitor {
                if (element_name == null) {
                        next ();
 
+                       parse_symbol_doc ();
+
                        while (current_token == MarkupTokenType.START_ELEMENT) {
                                if (!push_metadata ()) {
                                        skip_element ();