Remove extra whitespaces/tabs before EOL.

find . -name '*.[ch]' | xargs perl -pi -e 's/\t+$//; s/ +$//'

Thanks to Ludovic.

libnfc/nfc-internal.h

@@ -1,13 +1,13 @@
 /*-
  * Public platform independent Near Field Communication (NFC) library
- * 
+ *
  * Copyright (C) 2011, Romain Tartière, Romuald Conty
- * 
+ *
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as published by the
  * Free Software Foundation, either version 3 of the License, or (at your
  * option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
@@ -54,7 +54,7 @@
 
 /*
  * Buffer management macros.
- * 
+ *
  * The following macros ease setting-up and using buffers:
  * BUFFER_INIT (data, 5);      // data -> [ xx, xx, xx, xx, xx ]
  * BUFFER_SIZE (data);         // size -> 0