[pangomm] C++11, AttrList: Don't use nullptr with an integer

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 3b7e602bd4a08fb1f488b0ce0db7094acdaf6652
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Mon Dec 12 20:00:43 2016 +0100

    C++11, AttrList: Don't use nullptr with an integer

 pango/src/attrlist.ccg |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pango/src/attrlist.ccg b/pango/src/attrlist.ccg
index 0cfda89..83e93ad 100644
--- a/pango/src/attrlist.ccg
+++ b/pango/src/attrlist.ccg
@@ -48,7 +48,7 @@ AttrList::AttrList(const Glib::ustring& markup_text, gunichar accel_marker, Glib
 {
   //initialize output parameters:
   text.erase();
-  accel_char = nullptr;
+  accel_char = 0;
 
   gchar* pchText = nullptr;
   gboolean bTest = pango_parse_markup(markup_text.c_str(), -1 /* means null-terminated */, accel_marker,