[gtk: 1/2] gtkcomposetable: use g_size_checked_mul() for overflow checking

[Matthias Clasen <matthiasc src gnome org>]

commit b66e4cd64c939d5a1fb83dd1ebb6adabbf95ac01
Author: Christoph Reiter <creiter src gnome org>
Date:   Fri Apr 12 22:38:44 2019 +0200

    gtkcomposetable: use g_size_checked_mul() for overflow checking
    
    The check was added in !741, this replaces it with g_size_checked_mul()

 gtk/gtkcomposetable.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/gtk/gtkcomposetable.c b/gtk/gtkcomposetable.c
index e451cdb3bf..c355c6a7bd 100644
--- a/gtk/gtkcomposetable.c
+++ b/gtk/gtkcomposetable.c
@@ -837,7 +837,6 @@ gtk_compose_table_list_add_array (GSList        *compose_tables,
   GtkComposeTable *compose_table;
   gsize n_index_stride;
   gsize length;
-  gsize max_size = (gsize) -1;
   int i;
   guint16 *gtk_compose_seqs = NULL;
 
@@ -845,13 +844,12 @@ gtk_compose_table_list_add_array (GSList        *compose_tables,
   g_return_val_if_fail (max_seq_len <= GTK_MAX_COMPOSE_LEN, compose_tables);
 
   n_index_stride = MIN (max_seq_len, GTK_MAX_COMPOSE_LEN) + 2;
-  if (n_seqs > max_size / n_index_stride)
+  if (!g_size_checked_mul (&length, n_index_stride, n_seqs))
     {
       g_critical ("Overflow in the compose sequences");
       return compose_tables;
     }
 
-  length = n_index_stride * n_seqs;
   hash = gtk_compose_table_data_hash (data, length);
 
   if (g_slist_find_custom (compose_tables, GINT_TO_POINTER (hash), gtk_compose_table_find) != NULL)