[valadoc] Fix non-matching generic types of inferface implementations

[Rico Tzschichholz <ricotz src gnome org>]

commit 2d27185a90c2bafe3ebecf41d6f6d0d69dbcfcc3
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Sep 30 15:38:59 2016 +0200

    Fix non-matching generic types of inferface implementations

 src/libvaladoc/content/taglet.vala           |    2 +-
 src/libvaladoc/taglets/tagletinheritdoc.vala |    6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/libvaladoc/content/taglet.vala b/src/libvaladoc/content/taglet.vala
index a8fc4f1..c492621 100644
--- a/src/libvaladoc/content/taglet.vala
+++ b/src/libvaladoc/content/taglet.vala
@@ -27,7 +27,7 @@ public interface Valadoc.Content.Taglet : ContentElement {
 
        public abstract Rule? get_parser_rule (Rule run_rule);
 
-       public virtual Gee.List<Inline>? get_inheritable_documentation () {
+       public virtual Gee.List<ContentElement>? get_inheritable_documentation () {
                return null;
        }
 
diff --git a/src/libvaladoc/taglets/tagletinheritdoc.vala b/src/libvaladoc/taglets/tagletinheritdoc.vala
index 6e9aa43..d8b2885 100644
--- a/src/libvaladoc/taglets/tagletinheritdoc.vala
+++ b/src/libvaladoc/taglets/tagletinheritdoc.vala
@@ -188,13 +188,13 @@ public class Valadoc.Taglets.InheritDoc : InlineTaglet {
                comment.content.remove ((Paragraph) separator);
        }
 
-       private Run content_copy (Gee.List<Inline>? content) {
+       private Run content_copy (Gee.List<ContentElement>? content) {
                Run run = new Run (Run.Style.NONE);
                run.parent = this;
 
                if (content != null) {
-                       foreach (Inline item in content) {
-                               run.content.add ((Inline) item.copy (this));
+                       foreach (ContentElement item in content) {
+                               run.content.add (item.copy (this) as Inline);
                        }
                }