Fix determination of db opened (#139)

Author: asmsuechan

lib/sqlite.core.js

@@ -234,7 +234,7 @@ SQLitePlugin.prototype.sqlBatch = function(sqlStatements, success, error) {
 SQLitePlugin.prototype.open = function(success, error) {
   var openerrorcb, opensuccesscb;
 
-  if (this.dbname in this.openDBs) {
+  if (this.dbname in this.openDBs && this.openDBs[this.dbname] === DB_STATE_OPEN) {
     console.log('database already open: ' + this.dbname);
     nextTick((function(_this) {
       return function() {