Fix previous commit

I misunderstood how which works.
diff --git a/autogen.sh b/autogen.sh
index ee980cf..ff1b0c0 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -20,7 +20,7 @@
 }
 
 echo -n "checking for libtoolize... "
-which glibtoolize libtoolize || {
+which glibtoolize || which libtoolize || {
 	echo "*** No libtoolize (libtool) found, please install it ***"
 	exit 1
 }