[geary/mjog/780-fix-content-area-api-change] components.InfoBar: Fix compilation errors with get_action_area on F31

[Michael Gratton <mjog src gnome org>]

commit 2aa54a9d1c533dc4f0f95565b494f55874205b5b
Author: Michael Gratton <mike vee net>
Date:   Tue Mar 31 08:15:20 2020 +1100

    components.InfoBar: Fix compilation errors with get_action_area on F31
    
    GTK 3.24.16 fixed the bindings annotation for
    Gtk.InfoBar.get_action_area() and this has been picked up by valac
    master already.
    
    Fixes #780

 src/client/application/application-main-window.vala | 12 ++++++++++--
 src/client/components/components-info-bar.vala      |  6 ++++++
 2 files changed, 16 insertions(+), 2 deletions(-)
---
diff --git a/src/client/application/application-main-window.vala 
b/src/client/application/application-main-window.vala
index d4189970..290c09e5 100644
--- a/src/client/application/application-main-window.vala
+++ b/src/client/application/application-main-window.vala
@@ -547,7 +547,11 @@ public class Application.MainWindow :
             "Retry login, you will be prompted for your password"
         );
         auth_retry.clicked.connect(on_auth_problem_retry);
-        this.auth_problem_infobar.get_action_area().add(auth_retry);
+        var auth_action_box = (
+            this.auth_problem_infobar.get_action_area()
+            as Gtk.Box
+        );
+        auth_action_box.add(auth_retry);
 
         this.cert_problem_infobar = new Components.InfoBar(
             // Translators: An info bar status label
@@ -562,7 +566,11 @@ public class Application.MainWindow :
             "Check the security details for the connection"
         );
         cert_retry.clicked.connect(on_cert_problem_retry);
-        this.cert_problem_infobar.get_action_area().add(cert_retry);
+        var cert_action_box = (
+            this.auth_problem_infobar.get_action_area()
+            as Gtk.Box
+        );
+        cert_action_box.add(cert_retry);
 
         this.conversation_list_view.grab_focus();
     }
diff --git a/src/client/components/components-info-bar.vala b/src/client/components/components-info-bar.vala
index 6e3506c0..943218b2 100644
--- a/src/client/components/components-info-bar.vala
+++ b/src/client/components/components-info-bar.vala
@@ -94,4 +94,10 @@ public class Components.InfoBar : Gtk.InfoBar {
         show_all();
     }
 
+    // GTK 3.24.16 fixed the binding for this, but that and the VAPI
+    // change has yet to trickle down to common distros like F31
+    public new Gtk.Box get_action_area() {
+        return (Gtk.Box) base.get_action_area();
+    }
+
 }