remove support for non-ANSI compilation

*** 17,26 ****
--- 17,27 ----
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
   */
  
  #ifndef _USER_ATTR_H
  #define _USER_ATTR_H
*** 127,156 ****
          char   *res1;           /* reserved for future use */
          char   *res2;           /* reserved for future use */
          kva_t  *attr;           /* array of key-value pair attributes */
  } userattr_t;
  
- #ifdef  __STDC__
  extern userattr_t *getusernam(const char *);
  extern userattr_t *getuseruid(uid_t uid);
  extern userattr_t *getuserattr(void);
  extern userattr_t *fgetuserattr(struct __FILE *);
  extern void setuserattr(void);
  extern void enduserattr(void);
  extern void free_userattr(userattr_t *);
  
- #else                           /* not __STDC__ */
- 
- extern userattr_t *getusernam();
- extern userattr_t *getuseruid();
- extern userattr_t *getuserattr();
- extern userattr_t *fgetuserattr();
- extern void setuserattr();
- extern void enduserattr();
- extern void free_userattr();
- #endif
- 
  #ifdef  __cplusplus
  }
  #endif
  
  #endif  /* _USER_ATTR_H */
--- 128,145 ----