fixed bug where ekg does not show "no data" and fixed bug where snmp was not closed correctly

healthdisplay/src/main/java/de/psychose/ActorDisplay.java

@@ -107,7 +107,7 @@ public class ActorDisplay {
 
                 if (++counterEmg > timeout) {
                     lblEmg.setForeground(offColor);
-                    lblEkg.setText(offText);
+                    lblEmg.setText(offText);
                 } else {
                     lblEmg.setForeground(onColor);
                 }

healthdisplay/src/main/java/de/psychose/SnmpStatClient.java

@@ -67,6 +67,8 @@ public class SnmpStatClient {
                     }
                 }
             }
+
+            snmp.close();
         } catch (IOException e) {
             e.printStackTrace();
         }