awful.placement: fix name collision

Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/placement.lua.in

@@ -123,11 +123,11 @@ end
 -- @param c The client.
 function no_overlap(c)
     local cls = client.visible(c.screen)
-    local layout = layout.get()
+    local curlay = layout.get()
     local areas = { capi.screen[c.screen].workarea }
     local geometry = c:geometry()
     for i, cl in pairs(cls) do
-        if cl ~= c and (client.floating.get(cl) or layout == layout.suit.floating) then
+        if cl ~= c and (client.floating.get(cl) or curlay == layout.suit.floating) then
             areas = area_remove(areas, cl:geometry())
         end
     end