Fixed rendering issues in (vector) layers when map div has dir="rtl"

set. 
r=crschmidt (closes #1778)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@9114 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer.js

@@ -321,6 +321,7 @@ OpenLayers.Layer = OpenLayers.Class({
             this.div = OpenLayers.Util.createDiv(this.id);
             this.div.style.width = "100%";
             this.div.style.height = "100%";
+            this.div.dir = "ltr";
 
             this.events = new OpenLayers.Events(this, this.div, 
                                                 this.EVENT_TYPES);