Persistent Markers: handle string values properly

js/save.js

@@ -241,8 +241,8 @@ function Save() {
     }
     
     this.getPersistentMarker = function (player, name) {
-        var ctr = localStorage.getItem(prefix+'markers.'+player.id+'.'+name);
-        return parseInt(ctr, 10) || 0;
+        var val = localStorage.getItem(prefix+'markers.'+player.id+'.'+name);
+        return val || '';
     }
     
     this.setPersistentMarker = function (player, name, value) {

js/spniBehaviour.js

@@ -281,7 +281,7 @@ State.prototype.evaluateMarker = function (self, opp) {
         }
         
         if (this.marker.persistent) {
-            var curVal = save.getPersistentMarker(self, name);
+            var curVal = parseInt(save.getPersistentMarker(self, name), 10) || 0;
         } else {
             var curVal = parseInt(self.markers[name], 10) || 0;
         }
@@ -293,7 +293,7 @@ State.prototype.evaluateMarker = function (self, opp) {
         }
         
         if (this.marker.persistent) {
-            var curVal = save.getPersistentMarker(self, name);
+            var curVal = parseInt(save.getPersistentMarker(self, name), 10) || 0;
         } else {
             var curVal = parseInt(self.markers[name], 10) || 0;
         }