Mod1-Button2 on a floating but not-fixed client will make it tiled again

dwm.1

@@ -120,7 +120,7 @@ Quit dwm.
 Move current window while dragging. Tiled windows will be toggled to the floating state.
 .TP
 .B Mod1\-Button2
-Zooms/cycles current window to/from master area (tiled layout only).
+Zooms/cycles current window to/from master area. If it is floating (but not fixed) it will be toggled to the tiled state instead.
 .TP
 .B Mod1\-Button3
 Resize current window while dragging. Tiled windows will be toggled to the floating state.

dwm.c

@@ -342,8 +342,12 @@ buttonpress(XEvent *e) {
 				restack();
 			movemouse(c);
 		}
-		else if(ev->button == Button2)
+		else if(ev->button == Button2) {
+			if(isarrange(tile) && !c->isfixed && c->isfloating)
+				togglefloating(NULL);
+			else
 				zoom(NULL);
+		}
 		else if(ev->button == Button3 && !c->isfixed) {
 			if(!isarrange(floating) && !c->isfloating)
 				togglefloating(NULL);