* Changed header file include guards to unique namespace. Updated file headers comments with SPDX [issue #55] (#666)

src/bacnet/bacdef.h

@@ -3,12 +3,10 @@
  * @brief Core BACnet defines and enumerations and structures
  * @author Steve Karg <skarg@users.sourceforge.net>
  * @date 2004
- * @copyright 2004 Steve Karg <skarg@users.sourceforge.net>
- *
- * SPDX-License-Identifier: MIT
+ * @copyright SPDX-License-Identifier: MIT
  */
-#ifndef BACDEF_H
-#define BACDEF_H
+#ifndef BACNET_DEFINES_H
+#define BACNET_DEFINES_H
 
 #include <stddef.h>
 #include <stdint.h>