avoid exception after detecting invalid message

app/src/main/java/info/nightscout/android/medtronic/message/PumpTimeResponseMessage.java

@@ -26,9 +26,7 @@ public class PumpTimeResponseMessage extends MedtronicSendMessageResponseMessage
             // TODO - deal with this more elegantly
             Log.e(TAG, "Invalid message received for getPumpTime");
             pumpTime = new Date();
-        }
-
-        // FIXME - this needs to go into PumpTimeResponseMessage
+        } else {
             ByteBuffer dateBuffer = ByteBuffer.allocate(8);
             dateBuffer.order(ByteOrder.BIG_ENDIAN);
             dateBuffer.put(this.encode(), 0x3d, 8);
@@ -36,6 +34,7 @@ public class PumpTimeResponseMessage extends MedtronicSendMessageResponseMessage
             long offset = dateBuffer.getInt(4);
             pumpTime = MessageUtils.decodeDateTime(rtc, offset);
         }
+    }
 
     public Date getPumpTime() {
         return pumpTime;