applied Garys patch in a slightly modified way

diff --git a/dwm.c b/dwm.c
index f842b419221e698e6ba0bac919b4f3b74bb9a990..ba00afeb6aa87666837e467bf788393cc73d002a 100644 (file)
--- a/dwm.c
+++ b/dwm.c
@@ -529,7 +529,7 @@ clientmessage(XEvent *e) {
        if(!c)
                return;
        if(cme->message_type == netatom[NetWMState] && cme->data.l[1] == netatom[NetWMFullscreen]) {
-               if(cme->data.l[0]) {
+               if(cme->data.l[0] && !c->isfullscreen) {
                        XChangeProperty(dpy, cme->window, netatom[NetWMState], XA_ATOM, 32,
                                        PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
                        c->isfullscreen = True;