remove support for non-ANSI compilation

@@ -18,10 +18,12 @@
  *
  * CDDL HEADER END
  */
 
 /*
+ * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ *
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 

@@ -325,26 +327,15 @@
  * These defines are the mode parameter for the checksum routines.
  */
 #define CK_CHECKSUM     0       /* check checksum */
 #define CK_MAKESUM      1       /* generate checksum */
 
-#if defined(__STDC__)
-
 extern  int     read_vtoc(int, struct vtoc *);
 extern  int     write_vtoc(int, struct vtoc *);
 extern  int     read_extvtoc(int, struct extvtoc *);
 extern  int     write_extvtoc(int, struct extvtoc *);
 
-#else
-
-extern  int     read_vtoc();
-extern  int     write_vtoc();
-extern  int     read_extvtoc();
-extern  int     write_extvtoc();
-
-#endif  /* __STDC__ */
-
 #ifdef  __cplusplus
 }
 #endif
 
 #endif  /* _SYS_VTOC_H */