[공통][Bug] 오류 수정

app/src/main/java/kr/co/zumo/app/lifeplus/activity/ActivityBase.java

@@ -404,7 +404,7 @@ public abstract class ActivityBase extends AppCompatActivity implements IHelperP
    * @return
    */
   private boolean isDrawerOpen() {
-    return drawerLayout.isDrawerOpen(Gravity.END);
+    return null != drawerLayout && drawerLayout.isDrawerOpen(Gravity.END);
   }
 
   /**