Add null checking for #11

Author: mwatson

Src/StackifyLib/Internal/Logs/LogClient.cs

@@ -67,7 +67,7 @@ public bool CanSend()
 
         public bool CanQueue()
         {
-            if (!_LogQueue.CanQueue())
+            if (_LogQueue == null || !_LogQueue.CanQueue())
             {
                 return false;
             }

Src/StackifyLib/Logger.cs

@@ -95,6 +95,9 @@ public static AppIdentityInfo Identity()
         /// <returns></returns>
         public static bool CanSend()
         {
+            if (_LogClient == null)
+                return false;
+
             return _LogClient.CanQueue();
         }