Merge branch 'fix/CMM-955-reader-Subscribe-button-unresponsive-on-quick-tap' of https://github.com/wordpress-mobile/WordPress-Android into fix/CMM-955-reader-Subscribe-button-unresponsive-on-quick-tap

Author: adalpari

WordPress/src/main/java/org/wordpress/android/ui/reader/views/ReaderSiteHeaderView.java

@@ -56,7 +56,7 @@ public interface OnBlogInfoLoadedListener {
     private boolean mIsFeed;
 
     private ReaderFollowButton mFollowButton;
-    private ProgressBar mFollowProgress;
+    @Nullable private ProgressBar mFollowProgress;
     private ReaderBlog mBlogInfo;
     private OnBlogInfoLoadedListener mBlogInfoListener;
     private OnFollowListener mFollowListener;