Merge pull request #7 from alzybaad/master

Fixed problem when a view recycled from empty view is INVISIBLE.

Author: yhirano

library/src/main/java/jp/co/recruit_mp/android/widget/HeaderFooterGridView.java

@@ -576,7 +576,9 @@ public View getView(int position, View convertView, ViewGroup parent) {
                 if (mAdapter != null) {
                     adapterCount = mAdapter.getCount();
                     if (adjPosition < adapterCount) {
-                        return mAdapter.getView(adjPosition, convertView, parent);
+                        convertView = mAdapter.getView(adjPosition, convertView, parent);
+                        convertView.setVisibility(View.VISIBLE);
+                        return convertView;
                     }
                 }
             }