start work for hanchman

DangerousD/GameCore/GameObjects/LivingEntities/Monsters/Zombie.cs

@@ -38,7 +38,7 @@ namespace DangerousD.GameCore.GameObjects.LivingEntities.Monsters
                 Target();
                 Move(gameTime);
             }
-
+            fixBorder();
             base.Update(gameTime);
         }
 
@@ -130,5 +130,16 @@ namespace DangerousD.GameCore.GameObjects.LivingEntities.Monsters
                 }
             }
         }
+        public void fixBorder()
+        {
+            if(leftBorder <= 0)
+            {
+                leftBorder = 0;
+            }
+            if(rightBorder >= 800)
+            {
+                rightBorder = 760;
+            }
+        }
     }
 }