make: unifdef SUN5_0 (defined)

*** 34,48 ****
  
  
  /*
   * Included files
   */
- #if defined(SUN5_0) || defined(HP_UX)
  #include <dirent.h>             /* opendir() */
- #else
- #include <sys/dir.h>            /* opendir() */
- #endif
  #include <errno.h>              /* errno */
  #include <mk/defs.h>
  #include <mksh/macro.h>         /* getvar() */
  #include <mksh/misc.h>          /* get_prop(), append_prop() */
  #include <sys/stat.h>           /* lstat() */
--- 34,44 ----
*** 304,319 ****
          wchar_t                 *plain_file_name_p;
          Name                    plain_file;
          wchar_t                 tmp_wcs_buffer[MAXPATHLEN];
          DIR                     *dir_fd;
          int                     m_local_dependency=0;
- #if defined(SUN5_0) || defined(HP_UX)
  #define d_fileno d_ino
          register struct dirent  *dp;
- #else
-         register struct direct  *dp;
- #endif
          wchar_t                 *vpath = NULL;
          wchar_t                 *p;
          int                     result = 0;
  
          if(dir->hash.length >= MAXPATHLEN) {
--- 300,311 ----