applied dme's patch to prevent changing prevtags if nothing actually changed

diff --git a/dwm.c b/dwm.c
index 699aed1d3e43a41d99076a077f803344af536024..020adb3b10f303cfb8db4f31b1f10f6e24bf68c7 100644 (file)
--- a/dwm.c
+++ b/dwm.c
@@ -1976,14 +1976,17 @@ xerrorstart(Display *dsply, XErrorEvent *ee) {
 void
 view(const char *arg) {
        unsigned int i;
-
+       Bool tmp[LENGTH(tags)];
        Monitor *m = &monitors[monitorat()];
 
-       memcpy(m->prevtags, m->seltags, sizeof initags);
        for(i = 0; i < LENGTH(tags); i++)
-               m->seltags[i] = (NULL == arg);
-       m->seltags[idxoftag(arg)] = True;
-       arrange();
+               tmp[i] = (NULL == arg);
+       tmp[idxoftag(arg)] = True;
+       if(memcmp(m->seltags, tmp, sizeof initags) != 0) {
+               memcpy(m->prevtags, m->seltags, sizeof initags);
+               memcpy(m->seltags, tmp, sizeof initags);
+               arrange();
+       }
 }
 
 void