Merge pull request daimajia#99 from zhouqiangWang/master

fix removeSliderAt(position) function not work daimajia#88 and a NPE

Author: daimajia

demo/src/main/java/com/daimajia/slider/demo/MainActivity.java

@@ -54,8 +54,9 @@ protected void onCreate(Bundle savedInstanceState) {
                     .setOnSliderClickListener(this);
 
             //add your extra information
-            textSliderView.getBundle()
-                    .putString("extra",name);
+            if (textSliderView.getBundle() != null)
+                textSliderView.getBundle()
+                        .putString("extra",name);
 
            mDemoSlider.addSlider(textSliderView);
         }

library/src/main/java/com/daimajia/slider/library/SliderAdapter.java

@@ -49,7 +49,7 @@ public <T extends BaseSliderView> void removeSlider(T slider){
     }
 
     public void removeSliderAt(int position){
-        if(mImageContents.size() < position){
+        if(mImageContents.size() > position){
             mImageContents.remove(position);
             notifyDataSetChanged();
         }