configure.ac: bump to version 1.15.91 for the alpha release

diff --git a/configure.ac b/configure.ac
index d0a10e1..81cf407 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ AC_PREREQ([2.64])
 
 m4_define([wayland_major_version],  [1])
 m4_define([wayland_minor_version], [15])
-m4_define([wayland_micro_version],  [90])
+m4_define([wayland_micro_version],  [91])
 m4_define([wayland_version],
           [wayland_major_version.wayland_minor_version.wayland_micro_version])