rules: define geometry properties

Signed-off-by: Cedric GESTES <ctaf42@gmail.com>
Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/rules.lua.in

@@ -91,6 +91,11 @@ function apply(c)
                 elseif property == "switchtotag" and value
                     and entry.properties["tag"] then
                     atag.viewonly(entry.properties["tag"])
+                elseif property == "height" or property == "width" or
+                       property == "x" or property == "y" then
+                    local geo = c:geometry();
+                    geo[property] = value
+                    c:geometry(geo);
                 elseif type(c[property]) == "function" then
                     c[property](c, value)
                 else