[vala-extra-vapis] Adds bindings for error.h in libmemcached.vapi.

[Evan Nemerson <evann src gnome org>]

commit 343b8cd29f4cde98314509b78e9a5ca2dda80561
Author: Guillaume Poirier-Morency <guillaumepoiriermorency gmail com>
Date:   Sat Jul 4 21:59:49 2015 -0400

    Adds bindings for error.h in libmemcached.vapi.

 libmemcached.vapi |   18 ++++++++++++++++--
 1 files changed, 16 insertions(+), 2 deletions(-)
---
diff --git a/libmemcached.vapi b/libmemcached.vapi
index 4f0359c..83b4f3a 100644
--- a/libmemcached.vapi
+++ b/libmemcached.vapi
@@ -66,6 +66,13 @@ namespace Memcached {
     public Memcached.ReturnCode @delete ([CCode (array_length_type = "size_t")] uint8[] key, time_t 
expiration);
     public Memcached.ReturnCode delete_by_key ([CCode (array_length_type = "size_t")] uint8[] group_key, 
[CCode (array_length_type = "size_t")] uint8[] key, time_t expiration);
 
+    // error.h
+    public unowned string error ();
+    public unowned string last_error_message ();
+    public void error_print ();
+    public Memcached.ReturnCode last_error ();
+    public int last_error_errno ();
+
     // exist.h
     public Memcached.ReturnCode exist ([CCode (array_length_type = "size_t")] uint8[] key);
     public Memcached.ReturnCode exist_by_key ([CCode (array_length_type = "size_t")] uint8[] group_key, 
[CCode (array_length_type = "size_t")] uint8[] key);
@@ -107,6 +114,9 @@ namespace Memcached {
     public Memcached.ReturnCode append_by_key ([CCode (array_length_type = "size_t")] uint8[] group_key, 
[CCode (array_length_type = "size_t")] uint8[] key, [CCode (array_length_type = "size_t")] uint8[] value, 
time_t expiration, uint32 flags);
     public Memcached.ReturnCode cas_by_key ([CCode (array_length_type = "size_t")] uint8[] group_key, [CCode 
(array_length_type = "size_t")] uint8[] key, [CCode (array_length_type = "size_t")] uint8[] value, time_t 
expiration, uint32 flags, uint64 cas);
 
+    // strerror.h
+    public unowned string strerror (Memcached.ReturnCode rc);
+
     // touch.h
     public Memcached.ReturnCode touch ([CCode (array_length_type = "size_t")] uint8[] key, time_t 
expiration, uint32 flags);
     public Memcached.ReturnCode touch_by_key ([CCode (array_length_type = "size_t")] uint8[] group_key, 
[CCode (array_length_type = "size_t")] uint8[] key, time_t expiration, uint32 flags);
@@ -205,14 +215,18 @@ namespace Memcached {
   [Compact, CCode (cname = "memcached_instance_st", has_type_id = false, lower_case_cprefix = 
"memcached_server_")]
   public class Instance {
     public uint32 response_count ();
-    public string name ();
+    public unowned string name ();
     public in_port_t port ();
     public in_port_t srcport ();
     public void next_retry (time_t absolute_time);
-    public string type ();
+    public unowned string type ();
     public uint8 major_version ();
     public uint8 minor_version ();
     public uint8 micro_version ();
+
+    // error.h
+    public unowned string error ();
+    public Memcached.ReturnCode error_return ();
   }
 
   [CCode (cname = "memcached_server_list_st", has_type_id = false)]