Fix unlikely core dump with Xaw

* lwlib/lwlib-Xaw.c (make_dialog): Don’t dump core if calloc fails.
Caught with --enable-gcc-warnings.

1 files changed, 2 insertions, 0 deletions

diff --git a/lwlib/lwlib-Xaw.c b/lwlib/lwlib-Xaw.c
index d17acae728b..b09795ec38c 100644
--- a/lwlib/lwlib-Xaw.c
+++ b/lwlib/lwlib-Xaw.c
@@ -594,6 +594,8 @@ make_dialog (char* name,
             int nr_xft_data = left_buttons + right_buttons + 1;
             instance->xft_data = calloc (nr_xft_data + 1,
                                          sizeof(*instance->xft_data));
+            if (!instance->xft_data)
+              memory_full ((nr_xft_data + 1) * sizeof *instance->xft_data);
 
             fill_xft_data (&instance->xft_data[0], w, xft_font);
             XtAddCallback (dialog, XtNdestroyCallback, destroy_xft_data,