[공통][Bug] header null 일 때 에러 수정

app/src/main/java/kr/co/zumo/app/lifeplus/bean/api/LifeplusAPIBean.java

@@ -83,7 +83,10 @@ public class LifeplusAPIBean extends JsonBeanBase implements APIBean {
    */
   @Override
   public boolean isEmergency() {
-    return HEADER_MULTI_DEVICE_VALUE_MULTI.equals(getHeaders().get(LifeplusAPIBean.HEADER_MULTI_DEVICE));
+    if (null == headers) {
+      return false;
+    }
+    return HEADER_MULTI_DEVICE_VALUE_MULTI.equals(headers.get(LifeplusAPIBean.HEADER_MULTI_DEVICE));
   }
 
   @Override