applied Ryan Zheng's patch and re-releasing 5.7.2

config.mk

@@ -1,5 +1,5 @@
 # dwm version
-VERSION = 5.7.1
+VERSION = 5.7.2
 
 # Customize below to fit your system
 

dwm.c

@@ -1449,10 +1449,9 @@ void
 setlayout(const Arg *arg) {
 	if(!arg || !arg->v || arg->v != selmon->lt[selmon->sellt])
 		selmon->sellt ^= 1;
-	if(arg && arg->v) {
+	if(arg && arg->v)
 		selmon->lt[selmon->sellt] = (Layout *)arg->v;
 	strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, sizeof selmon->ltsymbol);
-	}
 	if(selmon->sel)
 		arrange(selmon);
 	else