remove support for non-ANSI compilation

*** 19,28 ****
--- 19,30 ----
   *
   * CDDL HEADER END
   */
  
  /*
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+  *
   * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*      Copyright (c) 1984 AT&T */
*** 29,51 ****
  /*        All Rights Reserved   */
  
  #ifndef _GETWIDTH_H
  #define _GETWIDTH_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <euc.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
- #ifdef  __STDC__
  extern void getwidth(eucwidth_t *);
- #else   /* __STDC__ */
- extern void getwidth();
- #endif  /* __STDC__ */
  
  #ifdef  __cplusplus
  }
  #endif
  
--- 31,47 ----