--- a/m4/dvdnav.m4
+++ b/m4/dvdnav.m4
@@ -1,33 +1,33 @@
 dnl Configure paths for DVDNAV
 dnl
 dnl Copyright (C) 2001 Daniel Caujolle-Bert <segfault@club-internet.fr>
-dnl  
+dnl
 dnl This program is free software; you can redistribute it and/or modify
 dnl it under the terms of the GNU General Public License as published by
 dnl the Free Software Foundation; either version 2 of the License, or
 dnl (at your option) any later version.
-dnl  
+dnl
 dnl This program is distributed in the hope that it will be useful,
 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 dnl GNU General Public License for more details.
-dnl  
+dnl
 dnl You should have received a copy of the GNU General Public License
 dnl along with this program; if not, write to the Free Software
 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-dnl  
-dnl  
+dnl
+dnl
 dnl As a special exception to the GNU General Public License, if you
 dnl distribute this file as part of a program that contains a configuration
 dnl script generated by Autoconf, you may include it under the same
 dnl distribution terms that you use for the rest of that program.
-dnl  
+dnl
 
 dnl AM_PATH_DVDNAV([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
 dnl Test for DVDNAV, and define DVDNAV_CFLAGS and DVDNAV_LIBS
 dnl
 AC_DEFUN([AM_PATH_DVDNAV],
-[dnl 
+[dnl
 dnl Get the cflags and libraries from the dvdnav-config script
 dnl
 AC_ARG_WITH(dvdnav-prefix,
@@ -36,7 +36,7 @@
 AC_ARG_WITH(dvdnav-exec-prefix,
     AC_HELP_STRING([--with-dvdnav-exec-prefix=DIR], [exec prefix where DVDNAV is installed (optional)]),
             dvdnav_config_exec_prefix="$withval", dvdnav_config_exec_prefix="")
-AC_ARG_ENABLE(dvdnavtest, 
+AC_ARG_ENABLE(dvdnavtest,
     AC_HELP_STRING([--disable-dvdnavtest], [do not try to compile and run a test DVDNAV program]),
             enable_dvdnavtest=$enableval, enable_dvdnavtest=yes)
 
@@ -89,7 +89,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-int 
+int
 main ()
 {
   int major, minor, sub;
@@ -133,7 +133,7 @@
     fi
     if test "x$no_dvdnav" = x ; then
        AC_MSG_RESULT(yes)
-       ifelse([$2], , :, [$2])     
+       ifelse([$2], , :, [$2])
     else
       AC_MSG_RESULT(no)
       if test "$DVDNAV_CONFIG" = "no" ; then