Fix aclocal warning:
/usr/share/aclocal/libxosd.m4:9: warning: underquoted definition of AM_PATH_LIBXOSD
--- xosd-2.2.14/libxosd.m4
+++ xosd-2.2.14/libxosd.m4
@@ -8,3 +8,3 @@
 dnl
-AC_DEFUN(AM_PATH_LIBXOSD,
+AC_DEFUN([AM_PATH_LIBXOSD],
 [dnl