heap_alloc: avoid integer overflow

* gl/lib/heap.c (heap_alloc): Use xnmalloc rather than xmalloc,
to avoid pathological overflow.

diff --git a/gl/lib/heap.c b/gl/lib/heap.c
index 1de3391a598dd8af0b8a703e30e11524206267ae..4672b6d5b9d4f227006c5a9626418e620b6ad6c3 100644 (file)
--- a/gl/lib/heap.c
+++ b/gl/lib/heap.c
@@ -41,7 +41,7 @@ heap_alloc (int (*compare)(const void *, const void *), size_t n_reserve)
   if (n_reserve == 0)
     n_reserve = 1;
 
-  heap->array = xmalloc (n_reserve * sizeof *(heap->array));
+  heap->array = xnmalloc (n_reserve, sizeof *(heap->array));
 
   heap->array[0] = NULL;
   heap->capacity = n_reserve;