setmfact should not have any effect if in floating layout

diff --git a/dwm.c b/dwm.c
index ed7fc0d..212bf3e 100644 (file)
--- a/dwm.c
+++ b/dwm.c
@@ -1467,7 +1467,7 @@ void
 setmfact(const char *arg) {
        double delta;
 
-       if(!arg)
+       if(!arg || lt->isfloating)
                return;
        delta = strtod(arg, NULL);
        if(arg[0] == '-' || arg[0] == '+') {