remove support for non-ANSI compilation

*** 17,26 ****
--- 17,28 ----
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * 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.
   */
  
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
*** 57,86 ****
                                  /* OFF: do rewind in defread */
  #define DC_STRIP_QUOTES 0004    /* ON: strip quotes; OFF: leave quotes */
  
  #define DC_STD          ((0) | (DC_CASE))
  
- #ifdef __STDC__
  extern int defcntl(int, int);
  extern int defopen(char *);
  extern char *defread(char *);
  
  extern int      defcntl_r(int, int, void *);
  extern void     *defopen_r(const char *);
  extern char     *defread_r(const char *, void *);
  extern void     defclose_r(void *);
- #else
- extern int defcntl();
- extern int defopen();
- extern char *defread();
  
- extern int      defcntl_r();
- extern void     *defopen_r();
- extern char     *defread_r();
- extern void     defclose_r();
- #endif
- 
  #define TURNON(flags, mask)     ((flags) |= (mask))
  #define TURNOFF(flags, mask)    ((flags) &= ~(mask))
  #define ISON(flags, mask)       (((flags) & (mask)) == (mask))
  #define ISOFF(flags, mask)      (((flags) & (mask)) != (mask))
  
--- 59,77 ----