[PR #1226] Moved delegate guard in Manager initializer in front of property assignment.

Source/Manager.swift

@@ -145,11 +145,11 @@ public class Manager {
         delegate: SessionDelegate,
         serverTrustPolicyManager: ServerTrustPolicyManager? = nil)
     {
+        guard delegate === session.delegate else { return nil }
+
         self.delegate = delegate
         self.session = session
 
-        guard delegate === session.delegate else { return nil }
-
         commonInit(serverTrustPolicyManager: serverTrustPolicyManager)
     }