Use *array() allocation functions where appropriate

This prevents overflow from multiplication.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

lib/commonio.c

@@ -635,7 +635,7 @@ commonio_sort (struct commonio_db *db, int (*cmp) (const void *, const void *))
 		return 0;
 	}
 
-	entries = malloc (n * sizeof (struct commonio_entry *));
+	entries = mallocarray (n, sizeof (struct commonio_entry *));
 	if (entries == NULL) {
 		return -1;
 	}