clients: fix an error message

_GNU_SOURCE is always true as of c228e23b055f54d29f2df, so
program_invocation_short_name is available.

diff --git a/clients/window.c b/clients/window.c
index 9ec9786..cbf8bf5 100644 (file)
--- a/clients/window.c
+++ b/clients/window.c
@@ -5330,7 +5330,7 @@ void *
 fail_on_null(void *p)
 {
        if (p == NULL) {
-               fprintf(stderr, "wayland-scanner: out of memory\n");
+               fprintf(stderr, "%s: out of memory\n", program_invocation_short_name);
                exit(EXIT_FAILURE);
        }