updated libtool check to handle things like '1.4b'

Original commit message from CVS:
updated libtool check to handle things like '1.4b'

diff --git a/autogen.sh b/autogen.sh
index 4648749..42a3281 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -119,7 +119,7 @@ fi
        DIE=1
 }
 
-libtool_version=`libtool --version | sed 's/^.* \([0-9\.]*\) .*$/\1/'`
+libtool_version=`libtool --version | sed 's/^.* \([0-9a-z\.]*\) .*$/\1/'`
 libtool_major=`echo $libtool_version | cut -d. -f1`
 libtool_minor=`echo $libtool_version | cut -d. -f2`
 libtool_micro=`echo $libtool_version | cut -d. -f3`