FP2-1321:[ST_2][Monkey] 'com.android.systemui' crash once.

'com.android.systemui' crash once.

Change-Id: I4b2d55e01e73d3182dc21361cb00e512819eecde
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
index 6dcbed6..5490e1b 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
@@ -897,8 +897,12 @@
             }
             case MotionEvent.ACTION_POINTER_UP:
                 onSecondaryPointerUp(ev);
-                mLastMotionY = (int) ev.getY(ev.findPointerIndex(mActivePointerId));
-                mDownX = (int) ev.getX(ev.findPointerIndex(mActivePointerId));
+                try{
+                    mLastMotionY = (int) ev.getY(ev.findPointerIndex(mActivePointerId));
+                    mDownX = (int) ev.getX(ev.findPointerIndex(mActivePointerId));
+                }catch(IllegalArgumentException e){
+                    e.printStackTrace();
+                }
                 break;
         }
         return true;