Fix the update test for PostgreSQL

dart-redstone/README.md

@@ -14,6 +14,7 @@ This test adds [Redstone.dart](http://redstonedart.org), a microframework for Da
 * [Dart yaml version 0.9.0](http://pub.dartlang.org/packages/yaml)
 * [Dart redstone_mapper version 0.1.3](http://pub.dartlang.org/packages/redstone_mapper)
 * [Dart redstone_mapper_mongo version 0.1.1+1](http://pub.dartlang.org/packages/redstone_mapper_mongo)
+* [Dart redstone_mapper_pg version 0.1.1](http://pub.dartlang.org/packages/redstone_mapper_pg)
 
 ## Test URLs
 

dart-redstone/pubspec.yaml

@@ -11,5 +11,5 @@ dependencies:
   redstone: 0.5.9
   redstone_mapper: 0.1.3
   redstone_mapper_mongo: 0.1.1+1
-  redstone_mapper_pg: 0.1.0
+  redstone_mapper_pg: 0.1.1
   yaml: 0.9.0

dart-redstone/server.dart

@@ -261,5 +261,6 @@ main(List<String> args) {
 }
 
 _parseQueriesParam(param) {
-  return param.isEmpty ? 1 : int.parse(param, radix: 10, onError: (_) => 1).clamp(1, 500);
+  return param == null || param.isEmpty ? 1 : 
+    int.parse(param, radix: 10, onError: (_) => 1).clamp(1, 500);
 }