Revert different treatment of and .

It generates invalid SQL queries when users accidentally set something to undefined rather than null.

Author: dxg

lib/Dialects/postgresql.js

@@ -30,11 +30,9 @@ exports.escapeId = function () {
 };
 
 exports.escapeVal = function (val, timeZone) {
-    if (val === undefined){
-        return 'DEFAULT';
-    }else if(val === null){
-        return 'NULL';
-    }
+	if (val === undefined || val === null) {
+		return 'NULL';
+	}
 
 	if (Array.isArray(val)) {
 		if (val.length === 1 && Array.isArray(val[0])) {

package.json

@@ -6,7 +6,7 @@
 		"sql",
 		"query"
   	],
-	"version": "0.1.20",
+	"version": "0.1.21",
 	"license": "MIT",
 	"repository": {
 		"url": "http://github.com/dresende/node-sql-query"