Fixed null http handler issue for close

pom.xml

@@ -5,7 +5,7 @@
 
 	<groupId>com.bwssystems.HABridge</groupId>
 	<artifactId>ha-bridge</artifactId>
-	<version>4.2.0</version>
+	<version>4.2.0a</version>
 	<packaging>jar</packaging>
 
 	<name>HA Bridge</name>

src/main/java/com/bwssystems/HABridge/plugins/domoticz/DomoticzHome.java

@@ -161,6 +161,7 @@ public class DomoticzHome implements Home {
 	}
 	@Override
 	public void closeHome() {
+		if(httpClient != null)
 			httpClient.closeHandler();
 		
 	}