fix PocketAction conversion exception when no ID is given; fixes #20

PocketSharp.Tests/ModifyTests.cs

@@ -88,6 +88,21 @@ namespace PocketSharp.Tests
     }
 
 
+    [Fact]
+    public async Task AreMultipleAddActionsSent()
+    {
+      PocketItem item = await Setup();
+
+      bool success = await client.SendActions(new List<PocketAction>()
+      {
+        new PocketAction() { Action = "add", Uri = new Uri("http://msdn.microsoft.com/en-us/library/windows/apps/jj841126.aspx") },
+        new PocketAction() { Action = "add", Uri = new Uri("http://pokiapp.com/changelog") }
+      });
+
+      Assert.True(success);
+    }
+
+
     private async Task<PocketItem> Setup()
     {
       PocketItem item = await client.Add(

PocketSharp/Models/PocketAction.cs

@@ -105,7 +105,7 @@ namespace PocketSharp.Models
         { "action", Action }
       };
 
-      if (ID != "0" && !String.IsNullOrEmpty(ID.ToString()))
+      if (!String.IsNullOrEmpty(ID) && ID != "0")
         parameters.Add("item_id", ID.ToString());
       if (Time != null)
         parameters.Add("time", Time != null ? Utilities.GetUnixTimestamp(Time).ToString() : null);