[folks] inspect: Fix use of deprecated Vala API

[Philip Withnall <pwithnall src gnome org>]

commit 4a6db9226dc9396830985f0f36e00aa0179303d2
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Fri Jan 23 14:58:21 2015 +0000

    inspect: Fix use of deprecated Vala API
    
    This wasn’t fixed before because there was apparently no way of
    specifying the base to use for the conversion. Then I realised that
    hexadecimal can be forced by ensuring the string has a ‘0x’ prefix,
    which it does.

 tools/inspect/command-signals.vala |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/tools/inspect/command-signals.vala b/tools/inspect/command-signals.vala
index 72b790a..afff682 100644
--- a/tools/inspect/command-signals.vala
+++ b/tools/inspect/command-signals.vala
@@ -229,8 +229,9 @@ private class Folks.Inspect.Commands.Signals : Folks.Inspect.Command
       if (class_name_or_instance.length > 2 &&
           class_name_or_instance[0] == '0' && class_name_or_instance[1] == 'x')
         {
-          /* We have a class instance */
-          ulong address = class_name_or_instance.to_ulong (null, 16);
+          /* We have a class instance. The ‘0x’ prefix ensures it will be
+           * parsed in base 16. */
+          var address = uint64.parse (class_name_or_instance);
           class_instance = (Object) address;
           assert (class_instance.get_type ().is_object ());
         }