remove support for non-ANSI compilation

@@ -17,10 +17,12 @@
  * 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 */

@@ -57,30 +59,19 @@
                                 /* 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))