[glibc] elf: Fix compile error with -DNDEBUG [BZ #18755]

[glibc] elf: Fix compile error with -DNDEBUG [BZ #18755]

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=964d15a007d7fb1258f2ad7c8cf4afcfb9a65719

commit 964d15a007d7fb1258f2ad7c8cf4afcfb9a65719
Author: Qingqing Li <liqingqing3@huawei.com>
Date:   Thu Sep 21 20:11:36 2023 +0800

    elf: Fix compile error with -DNDEBUG [BZ #18755]
    
    Compilation fails when building with -DNDEBUG after commit a3189f66a5f2fe86568286fa025fa153be04c6c0.
    Here is the error:
    
    dl-close.c: In function ‘_dl_close_worker’:
    dl-close.c:140:22: error: unused variable ‘nloaded’ [-Werror=unused-variable]
      140 |   const unsigned int nloaded = ns->_ns_nloaded;
    
    Add __attribute_maybe_unused__ for‘nloaded’to fix it.
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 elf/dl-close.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/elf/dl-close.c b/elf/dl-close.c
index c9a7d06577..24cc4750a5 100644
--- a/elf/dl-close.c
+++ b/elf/dl-close.c
@@ -137,7 +137,7 @@ _dl_close_worker (struct link_map *map, bool force)
   dl_close_state = pending;
 
   bool any_tls = false;
-  const unsigned int nloaded = ns->_ns_nloaded;
+  const unsigned int nloaded __attribute_maybe_unused__ = ns->_ns_nloaded;
 
   /* Run over the list and assign indexes to the link maps.  */
   int idx = 0;