Moved validate check down (fixed error creator not set)

ManagedPool/Pool_T_.cs

@@ -62,13 +62,13 @@ namespace eu.railduction.netcore.dll.ManagedPool
             this.increaseBuffer = increaseBuffer;
             this.decreaseBuffer = decreaseBuffer;
 
-            // Validate objects state
-            validate();
-
             this.creator = creator;
             this.destructor = destructor;
             this.healthChecker = healthChecker;
 
+            // Validate objects state
+            validate();
+
             // Create the minimum amount of objects
             Task.Run(() => createNewObjects(min));
         }