Adjust position of multiple-inclusion protection in .h files

attributes.h

@@ -1,12 +1,12 @@
 /* This program is copyright (c) 2009-2011 by Roderick W. Smith. It is distributed
   under the terms of the GNU GPL version 2, as detailed in the COPYING file. */
 
-#include <stdint.h>
-#include <string>
-
 #ifndef __GPT_ATTRIBUTES
 #define __GPT_ATTRIBUTES
 
+#include <stdint.h>
+#include <string>
+
 #define NUM_ATR 64 /* # of attributes -- 64, since it's a 64-bit field */
 #define ATR_NAME_SIZE 25 /* maximum size of attribute names */