Fix problem where when clickForPlot was used.

Clicking on an area of the map where the spatial reference system is invalid, it would cause an error rather than automatically switching to a valid spatial reference system.

js/jquery.indiciaMapPanel.js

@@ -2141,6 +2141,7 @@ var destroyAllFeatures;
       var point = new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat);
       var polygon;
       var plotShape;
+      var system;
       if (div.settings.clickForPlot) {
         // Get plot shape using jQuery or fall back on form structure option
         if ($('#' + div.settings.plotShapeId).val()) {
@@ -2198,14 +2199,16 @@ var destroyAllFeatures;
           plot.wkt = feature.geometry.transform(div.map.projection, div.indiciaProjection).toString();
         }
         var precision = div.settings.plotPrecision;
+        system = chooseBestSystem(div, point, _getSystem());
+        $('select#' + opts.srefSystemId).val(system);
         // Request sref of point that was clicked
-        pointToSref(div, point, _getSystem(), function (data) {
+        pointToSref(div, point, system, function (data) {
           plot.sref = data.sref;
           handleSelectedPositionOnMap(lonlat, div, plot);
         }, undefined, precision);
       } else {
         // Clicking to locate an sref (eg an OSGB grid square)
-        var system = chooseBestSystem(div, point, _getSystem());
+        system = chooseBestSystem(div, point, _getSystem());
         $('select#' + opts.srefSystemId).val(system);
         pointToSref(div, point, system, function(data) {
           handleSelectedPositionOnMap(lonlat, div, data);