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 2010 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
*** 46,72 ****
   * true.  ASSERT() is included only for debugging, and is a no-op in
   * production kernels.  VERIFY(ex), on the other hand, behaves like
   * ASSERT and is evaluated on both debug and non-debug kernels.
   */
  
- #if defined(__STDC__)
  extern int assfail(const char *, const char *, int);
  #define VERIFY(EX) ((void)((EX) || assfail(#EX, __FILE__, __LINE__)))
  #if DEBUG
  #define ASSERT(EX) ((void)((EX) || assfail(#EX, __FILE__, __LINE__)))
  #else
  #define ASSERT(x)  ((void)0)
  #endif
- #else   /* defined(__STDC__) */
- extern int assfail();
- #define VERIFY(EX) ((void)((EX) || assfail("EX", __FILE__, __LINE__)))
- #if DEBUG
- #define ASSERT(EX) ((void)((EX) || assfail("EX", __FILE__, __LINE__)))
- #else
- #define ASSERT(x)  ((void)0)
- #endif
- #endif  /* defined(__STDC__) */
  
  /*
   * Assertion variants sensitive to the compilation data model
   */
  #if defined(_LP64)
--- 48,64 ----