Fix -Wsign-compare warning in quit() function

Reported by gcc 7.3:
xbiff.c: In function ‘quit’:
xbiff.c:55:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         event->xclient.data.l[0] != wm_delete_window) {
                                  ^

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/xbiff.c b/xbiff.c
index a5ecdef..5fcdb51 100644
--- a/xbiff.c
+++ b/xbiff.c
@@ -52,7 +52,7 @@ static Atom wm_delete_window;
 static void quit (Widget w, XEvent *event, String *params, Cardinal *num_params)
 {
     if (event->type == ClientMessage &&
-        event->xclient.data.l[0] != wm_delete_window) {
+        ((Atom) event->xclient.data.l[0]) != wm_delete_window) {
         XBell (XtDisplay(w), 0);
         return;
     }