Float == Number Assertion error while using sphinx with nodejs

I am using sphinx for running the following set of queries via nodejs :-

sphClient.SetGeoAnchor("latitude", "longitude", lat, long);
sphClient.SetFilterRange("@geodist",0,1000);
var res = sphClient.Query("@country country_name");

However when i run this it gives me the following error :-

throw new assert.AssertionError({
    ^
AssertionError: "number" == "float"
at SphinxClient.SetGeoAnchor (/node_modules/sphinxapi/lib/sphinxapi.js:395:9)
at Socket.<anonymous> (/node_modules/posts/egx.js:331:15)
at Socket.EventEmitter.emit [as $emit] (events.js:95:17)
at SocketNamespace.handlePacket (/node_modules/socket.io/lib/namespace.js:335:22)
at Manager.onClientMessage (/node_modules/socket.io/lib/manager.js:488:38)
at WebSocket.Transport.onMessage (/node_modules/socket.io/lib/transport.js:387:20)
at Parser.<anonymous> (/node_modules/socket.io/lib/transports/websocket/hybi-16.js:39:10)
at Parser.EventEmitter.emit (events.js:95:17)
at finish (/node_modules/socket.io/lib/transports/websocket/hybi-16.js:288:16)
at Parser.expectHandler (/node_modules/socket.io/lib/transports/websocket/hybi-16.js:299:15)

I even understand what the problem is , after viewing sphinxapi.js , i found out that it compares the typeof(lat) , typeof(long) with "float" , however nodejs returns only "number" . I have tried parseFloat . Also changing the comparison to "number" gives me another error like :-

/node_modules/sphinxapi/lib/sphinxapi.js:79
        l += Number( obj.hasOwnProperty(k) );
                     ^
ReferenceError: obj is not defined
at len (/node_modules/sphinxapi/lib/sphinxapi.js:79:17)
at SphinxClient.AddQuery (/node_modules/sphinxapi/lib/sphinxapi.js:572:6)
at SphinxClient.Query (/node_modules/sphinxapi/lib/sphinxapi.js:476:7)
at Socket.<anonymous> (/node_modules/posts/egx.js:333:25)
at Socket.EventEmitter.emit [as $emit] (events.js:95:17)
at SocketNamespace.handlePacket (/node_modules/socket.io/lib/namespace.js:335:22)
at Manager.onClientMessage (/node_modules/socket.io/lib/manager.js:488:38)
at WebSocket.Transport.onMessage (/node_modules/socket.io/lib/transport.js:387:20)
at Parser.<anonymous> (/node_modules/socket.io/lib/transports/websocket/hybi-16.js:39:10)
at Parser.EventEmitter.emit (events.js:95:17)