[gtk+] Bump Pango requirement to 1.37.3

[Christoph Reiter <creiter src gnome org>]

commit b24ce67c46b07c62679f8eb62d2259b46d895c07
Author: Christoph Reiter <creiter src gnome org>
Date:   Sun Aug 16 08:04:37 2015 +0200

    Bump Pango requirement to 1.37.3
    
    GTK+ now uses pango_attr_foreground_alpha_new, pango_attr_background_alpha_new,
    PANGO_ATTR_FOREGROUND_ALPHA, PANGO_ATTR_BACKGROUND_ALPHA,
    pango_renderer_set_alpha, pango_renderer_get_alpha, which were all added
    after 1.37.2.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6ee457d..1ab797a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -54,7 +54,7 @@ m4_define([glib_min_required_version], m4_join([_], [GLIB_VERSION], glib_require
 m4_define([glib_max_allowed_version], m4_join([_], [GLIB_VERSION], glib_required_major, 
glib_max_allowed_minor))
 GLIB_VERSION_CFLAGS="-DGLIB_MIN_REQUIRED_VERSION=glib_min_required_version 
-DGLIB_MAX_ALLOWED_VERSION=glib_max_allowed_version"
 
-m4_define([pango_required_version], [1.37.1])
+m4_define([pango_required_version], [1.37.3])
 m4_define([atk_required_version], [2.15.1])
 m4_define([cairo_required_version], [1.14.0])
 m4_define([gdk_pixbuf_required_version], [2.30.0])