[geary/mjog/fix-composer-undhandled-error-build-warning] Fix unhandled error build waning

[Michael Gratton <mjog src gnome org>]

commit 09b8c8e5b90de3c19027e74a7e8875125f5efafc
Author: Michael Gratton <mike vee net>
Date:   Tue Nov 5 10:59:51 2019 +1100

    Fix unhandled error build waning

 src/client/application/application-controller.vala | 11 ++++++++---
 src/client/composer/composer-widget.vala           |  3 ++-
 2 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/src/client/application/application-controller.vala 
b/src/client/application/application-controller.vala
index 22f22758..204b5599 100644
--- a/src/client/application/application-controller.vala
+++ b/src/client/application/application-controller.vala
@@ -2094,8 +2094,9 @@ public class Application.Controller : Geary.BaseObject {
                 try {
                     full = yield context.emails.fetch_email_async(
                         referred.id,
-                        Geary.ComposedEmail.REQUIRED_REPLY_FIELDS,
-                        Geary.Folder.ListFlags.NONE,
+                        Geary.ComposedEmail.REQUIRED_REPLY_FIELDS |
+                        ComposerWidget.REQUIRED_FIELDS,
+                        NONE,
                         cancellable
                     );
                 } catch (Error e) {
@@ -2103,7 +2104,11 @@ public class Application.Controller : Geary.BaseObject {
                 }
             }
         }
-        yield widget.load(full, quote, cancellable);
+        try {
+            yield widget.load(full, quote, cancellable);
+        } catch (GLib.Error err) {
+            report_problem(new Geary.ProblemReport(err));
+        }
         widget.set_focus();
     }
 
diff --git a/src/client/composer/composer-widget.vala b/src/client/composer/composer-widget.vala
index 9c4878ea..ff59420a 100644
--- a/src/client/composer/composer-widget.vala
+++ b/src/client/composer/composer-widget.vala
@@ -623,7 +623,8 @@ public class ComposerWidget : Gtk.EventBox, Geary.BaseInterface {
      */
     public async void load(Geary.Email? referred = null,
                            string? quote = null,
-                           GLib.Cancellable? cancellable) {
+                           GLib.Cancellable? cancellable)
+        throws GLib.Error {
         if (referred != null &&
             !referred.fields.is_all_set(REQUIRED_FIELDS)) {
             throw new Geary.EngineError.INCOMPLETE_MESSAGE(