[krb5-auth-dialog] Enable silent build rules

[Guido Günther <guidog src gnome org>]

commit 221ec2732acc5ac58ceaf67101614d8115268e14
Author: Guido Günther <agx sigxcpu org>
Date:   Sun Feb 7 02:32:24 2010 +0100

    Enable silent build rules
    
    if available

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index aa01c1f..0f9d81c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,6 +5,7 @@ AM_INIT_AUTOMAKE([-Wno-portability])
 AM_CONFIG_HEADER(config.h)
 
 AM_MAINTAINER_MODE
+m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 IT_PROG_INTLTOOL([0.35.0])