[pessulus] [build] Fix autogen.sh failing because of missing m4 directory

[Vincent Untz <vuntz src gnome org>]

commit d580f7b74a8b3c5fb5f6d342768494c979924c91
Author: Vincent Untz <vuntz gnome org>
Date:   Tue Jul 28 17:56:01 2009 +0200

    [build] Fix autogen.sh failing because of missing m4 directory

 autogen.sh |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index c0e95d5..f341af8 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -19,4 +19,6 @@ which gnome-autogen.sh || {
     exit 1
 }
 
+test -d $srcdir/m4 || mkdir $srcdir/m4
+
 . gnome-autogen.sh