[geary] Fix compile error with vala git master. Fixes Bug 790567.

[Michael Gratton <mjog src gnome org>]

commit f42a5d4f12bca23f65a5fd5d5c0066e5c45d2b61
Author: Michael James Gratton <mike vee net>
Date:   Tue Nov 21 10:42:00 2017 +1100

    Fix compile error with vala git master. Fixes Bug 790567.
    
    * src/engine/imap/response/imap-namespace-response.vala
      (NamespaceResponse): Don't try to use arrays as properties. Fix call
      sites.

 .../imap/response/imap-namespace-response.vala     |   16 ++++++++--------
 src/engine/imap/transport/imap-client-session.vala |    2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)
---
diff --git a/src/engine/imap/response/imap-namespace-response.vala 
b/src/engine/imap/response/imap-namespace-response.vala
index 2520b82..f3f6b0a 100644
--- a/src/engine/imap/response/imap-namespace-response.vala
+++ b/src/engine/imap/response/imap-namespace-response.vala
@@ -13,9 +13,9 @@
 public class Geary.Imap.NamespaceResponse : BaseObject {
 
 
-    public Namespace[]? personal { get; private set; default = null; }
-    public Namespace[]? user { get; private set; default = null; }
-    public Namespace[]? shared { get; private set; default = null; }
+    public Gee.List<Namespace>? personal { get; private set; default = null; }
+    public Gee.List<Namespace>? user { get; private set; default = null; }
+    public Gee.List<Namespace>? shared { get; private set; default = null; }
 
 
     /**
@@ -55,12 +55,12 @@ public class Geary.Imap.NamespaceResponse : BaseObject {
         );
     }
 
-    private static Namespace[]? parse_namespaces(ListParameter? list) throws ImapError {
-        Namespace[]? nss = null;
+    private static Gee.List<Namespace>? parse_namespaces(ListParameter? list) throws ImapError {
+        Gee.List<Namespace>? nss = null;
         if (list != null) {
-            nss = new Namespace[list.size];
+            nss = new Gee.ArrayList<Namespace>();
             for (int i = 0; i < list.size; i++) {
-                nss[i] = parse_namespace(list.get_as_list(i));
+                nss.add(parse_namespace(list.get_as_list(i)));
             }
         }
         return nss;
@@ -77,7 +77,7 @@ public class Geary.Imap.NamespaceResponse : BaseObject {
         return ns;
     }
 
-    public NamespaceResponse(Namespace[]? personal, Namespace[]? user, Namespace[]? shared) {
+    public NamespaceResponse(Gee.List<Namespace>? personal, Gee.List<Namespace>? user, Gee.List<Namespace>? 
shared) {
         this.personal = personal;
         this.user = user;
         this.shared = shared;
diff --git a/src/engine/imap/transport/imap-client-session.vala 
b/src/engine/imap/transport/imap-client-session.vala
index ea4bc07..4954cbb 100644
--- a/src/engine/imap/transport/imap-client-session.vala
+++ b/src/engine/imap/transport/imap-client-session.vala
@@ -1007,7 +1007,7 @@ public class Geary.Imap.ClientSession : BaseObject {
         }
     }
 
-    private inline void update_namespaces(Namespace[]? response, Gee.List<Namespace> list) {
+    private inline void update_namespaces(Gee.List<Namespace>? response, Gee.List<Namespace> list) {
         if (response != null) {
             foreach (Namespace ns in response) {
                 list.add(ns);