[gnome-music] configure: Require PyGObject >=3.21.1

[Marinus Schraal <mschraal src gnome org>]

commit 1b903cbe13e144b7e800578191915f4c8d79aa69
Author: Marinus Schraal <mschraal src gnome org>
Date:   Wed Jun 8 00:21:45 2016 +0200

    configure: Require PyGObject >=3.21.1
    
    PyGObject 3.21.1 allows for shorthand versions of treemodel getters and
    setters with lists of indices.
    See https://bugzilla.gnome.org/show_bug.cgi?id=766580 for more
    information.

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 7c8420b..e91018c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -34,6 +34,9 @@ GOBJECT_INTROSPECTION_REQUIRE([1.35.9])
 PKG_CHECK_MODULES([GTK], [gtk+-3.0 >= 3.19.3])
 PKG_CHECK_MODULES(MEDIAART, [libmediaart-2.0])
 
+PYGOBJECT_MIN_VERSION=3.21.1
+PKG_CHECK_MODULES(PYGOBJECT, [pygobject-3.0 >= $PYGOBJECT_MIN_VERSION])
+
 TRACKER_MIN_VERSION=1.8.0
 PKG_CHECK_MODULES(TRACKER, [tracker-sparql-1.0 >= $TRACKER_MIN_VERSION])