[libgtop] Post-release version bump.

[Benoît Dejean <bdejean src gnome org>]

commit c8a4c3d2a1b1ad3a148cab55d1c3fc300be21f8d
Author: Benoît Dejean <bdejean gmail com>
Date:   Tue Aug 25 22:33:47 2015 +0200

    Post-release version bump.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a9073f9..f7a6a8b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ dnl
 
 m4_define([libgtop_major_version], [2])
 m4_define([libgtop_minor_version], [31])
-m4_define([libgtop_micro_version], [90])
+m4_define([libgtop_micro_version], [91])
 m4_define([libgtop_version], [libgtop_major_version.libgtop_minor_version.libgtop_micro_version])
 
 dnl  increment if the interface has additions, changes, removals.