- fixed null reference check

Author: blazekv

src/MailQ/Entities/v2/CampaignEntity.php

@@ -48,9 +48,15 @@ public function getName() {
     }
 
     public function getCreated() {
-        return $this->created->format('Y-m-d\TH:i:s.u');
+		if ($this->created != null) {
+			return $this->created->format('Y-m-d\TH:i:s.u');
+		}
+		else {
+			return null;
+		}
     }
 
+	
 	public function getCreatedAsDateTime() {
         return $this->created;
     }

src/MailQ/Entities/v2/NewsletterEntity.php

@@ -146,11 +146,21 @@ public function getStatus() {
     }
 
     public function getFrom() {
-        return $this->from->format('Y-m-d\TH:i:s.u');
+		if ($this->from != null) {
+			return $this->from->format('Y-m-d\TH:i:s.u');
+		}
+		else {
+			return null;
+		}
     }
 
     public function getTo() {
-        return $this->to->format('Y-m-d\TH:i:s.u');
+		if ($this->to != null) {
+			return $this->to->format('Y-m-d\TH:i:s.u');
+		}
+		else {
+			return null;
+		}
     }
 
 	public function getFromAsDateTime() {