Assume POSIX 1003.1-1988 or later for grp.h, pwd.h.

* dired.c (stat_uname, stat_gname):
* fileio.c (Fexpand_file_name): Remove no-longer-needed casts.

src/ChangeLog

 2012-11-27  Paul Eggert  <eggert@cs.ucla.edu>
+	Assume POSIX 1003.1-1988 or later for grp.h, pwd.h.
+	* dired.c (stat_uname, stat_gname):
+	* fileio.c (Fexpand_file_name): Remove no-longer-needed casts.
+
 	Assume POSIX 1003.1-1988 or later for errno.h (Bug#12968).
 	* dired.c (directory_files_internal, file_name_completion):
 	Assume EAGAIN and EINTR are defined.
+
 	* fileio.c (Fcopy_file): Assume EISDIR is defined.
 	* gmalloc.c (ENOMEM, EINVAL): Assume they're defined.
 	* gnutls.c (emacs_gnutls_write): Assume EAGAIN is defined.

src/dired.c

@@ -820,7 +820,7 @@ stat_uname (struct stat *st)
 #ifdef WINDOWSNT
   return st->st_uname;
 #else
-  struct passwd *pw = (struct passwd *) getpwuid (st->st_uid);
+  struct passwd *pw = getpwuid (st->st_uid);
 
   if (pw)
     return pw->pw_name;
@@ -835,7 +835,7 @@ stat_gname (struct stat *st)
 #ifdef WINDOWSNT
   return st->st_gname;
 #else
-  struct group *gr = (struct group *) getgrgid (st->st_gid);
+  struct group *gr = getgrgid (st->st_gid);
 
   if (gr)
     return gr->gr_name;

src/fileio.c

@@ -1042,7 +1042,7 @@ filesystem tree, not (expand-file-name ".."  dirname).  */)
 	  o [p - nm] = 0;
 
 	  block_input ();
-	  pw = (struct passwd *) getpwnam (o + 1);
+	  pw = getpwnam (o + 1);
 	  unblock_input ();
 	  if (pw)
 	    {