[gcc r16-3608] Fix uninitialized variable in frontend [PR121806]

[Sam James]

https://gcc.gnu.org/g:6b008944e7bc3a342a734c4fcf1001d63fd0a6f8

commit r16-3608-g6b008944e7bc3a342a734c4fcf1001d63fd0a6f8
Author: Andre Vehreschild <vehre@gcc.gnu.org>
Date:   Thu Sep 4 08:20:04 2025 +0200

    Fix uninitialized variable in frontend [PR121806]
    
    gcc/ChangeLog:
            PR middle-end/121806
            * gcc.cc (for_each_path): Initialize return value.

Diff:
---
 gcc/gcc.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/gcc.cc b/gcc/gcc.cc
index 722d42c69683..8da821e92ac4 100644
--- a/gcc/gcc.cc
+++ b/gcc/gcc.cc
@@ -2788,7 +2788,7 @@ for_each_path (const struct path_prefix *paths,
   const char *multi_suffix;
   const char *just_multi_suffix;
   char *path = NULL;
-  decltype (callback (nullptr)) ret;
+  decltype (callback (nullptr)) ret = nullptr;
   bool skip_multi_dir = false;
   bool skip_multi_os_dir = false;