[gcc r14-4366] diagnostics: fix missing init of set_locations_cb

[David Malcolm]

https://gcc.gnu.org/g:c64693fb885f21fafa01d67c5d85e11942770a7c

commit r14-4366-gc64693fb885f21fafa01d67c5d85e11942770a7c
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Mon Oct 2 12:16:54 2023 -0400

    diagnostics: fix missing init of set_locations_cb
    
    gcc/ChangeLog:
            * diagnostic.cc (diagnostic_initialize): Initialize
            set_locations_cb to nullptr.
    
    Signed-off-by: David Malcolm <dmalcolm@redhat.com>

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

diff --git a/gcc/diagnostic.cc b/gcc/diagnostic.cc
index 00183b10700..28ab74ff23e 100644
--- a/gcc/diagnostic.cc
+++ b/gcc/diagnostic.cc
@@ -245,6 +245,7 @@ diagnostic_initialize (diagnostic_context *context, int n_opts)
   context->begin_group_cb = NULL;
   context->end_group_cb = NULL;
   context->final_cb = default_diagnostic_final_cb;
+  context->set_locations_cb = nullptr;
   context->ice_handler_cb = NULL;
   context->includes_seen = NULL;
   context->m_client_data_hooks = NULL;