[PATCH] canonicalize: Initialize 'dest' pointer in 'realpath_stk' [BZ #32577]

[Nikhil R]

From: Nikhil R <nikhilr5@kpit.com>

Fixes a GCC warning when compiling with the '-Os' optimization flag:
| canonicalize.c: In function 'realpath_stk':
| canonicalize.c:424:50: error: 'dest' may be used uninitialized in this function [-Werror=maybe-uninitialized]
|   424 |   return scratch_buffer_dupfree (rname_buf, dest - rname);

The `dest` pointer is now explicitly initialized to ensure
it is not used uninitialized, preventing potential undefined
behavior and eliminating the warning.

Signed-off-by: Nikhil R <nikhilr5@kpit.com>
---
 stdlib/canonicalize.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/canonicalize.c b/stdlib/canonicalize.c
index 528bf49acf..546c7b920c 100644
--- a/stdlib/canonicalize.c
+++ b/stdlib/canonicalize.c
@@ -187,7 +187,7 @@ struct realpath_bufs
 static char *
 realpath_stk (const char *name, char *resolved, struct realpath_bufs *bufs)
 {
-  char *dest;
+  char *dest = NULL;
   char const *start;
   char const *end;
   int num_links = 0;
-- 
2.17.1