Fix use of "style_version" with GET (inline styles)

It took a lot of time to produce a testcase for this as the test
config was setting srid to 4326 but not changing geom column name
thus all tiles fetched by tests returned blank (ouch!)

lib/cartodb/server_options.js

@@ -65,7 +65,7 @@ module.exports = function(){
     me.req2params = function(req, callback){
 
         // Whitelist query parameters and attach format
-        var good_query = ['sql', 'geom_type', 'cache_buster', 'cache_policy', 'callback', 'interactivity', 'map_key', 'api_key', 'style'];
+        var good_query = ['sql', 'geom_type', 'cache_buster', 'cache_policy', 'callback', 'interactivity', 'map_key', 'api_key', 'style', 'style_version'];
         var bad_query  = _.difference(_.keys(req.query), good_query);
 
         _.each(bad_query, function(key){ delete req.query[key]; });