turning hour param to float

www/functions_SQLite.js

@@ -136,7 +136,7 @@ exports.seriesTagValues = function(req, res){
 	db.serialize(function(){
 		var query = "SELECT * FROM vals WHERE tagID = ? AND dateAdded > DATETIME('now', '-? HOUR')";
 		var prepQuery = db.prepare(query);
-		prepQuery.all(req.params.tag, req.params.hours, function(err, rows){
+		prepQuery.all(req.params.tag, parseFloat(req.params.hours), function(err, rows){
 			prepQuery.finalize();
 			db.close();
 			if (err){