[newlib-cygwin/cygwin-3_4-branch] Cygwin: gen_full_path_at: drop never reached code

[Corinna Vinschen <corinna@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=26775886a3b4d3c858f40f6f42b61f866d9c1c2a

commit 26775886a3b4d3c858f40f6f42b61f866d9c1c2a
Author:     Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Wed Jul 12 13:31:31 2023 +0200
Commit:     Corinna Vinschen <corinna@vinschen.de>
CommitDate: Wed Jul 26 15:19:59 2023 +0200

    Cygwin: gen_full_path_at: drop never reached code
    
    The check if the local variable p is NULL is useless.  The preceeding
    code always sets p to a valid pointer, or it crashes if path_ret is
    invalid (which would be a bug in Cygwin).
    
    Fixes: c57b57e5c43a ("* cygwin.din: Sort.")
    Reviewed-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/syscalls.cc | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 5adc614ec30f..a8b8206af0fc 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -4447,11 +4447,6 @@ gen_full_path_at (char *path_ret, int dirfd, const char *pathname,
 	    }
 	  p = stpcpy (path_ret, cfd->get_name ());
 	}
-      if (!p)
-	{
-	  set_errno (ENOTDIR);
-	  return -1;
-	}
       if (pathname)
 	{
 	  if (!*pathname)