satisfy codacy

src/main/java/com/owncloud/android/ui/preview/PreviewImageFragment.java

@@ -755,7 +755,7 @@ public class PreviewImageFragment extends FileFragment {
         try {
             Snackbar.make(getView(), R.string.auth_no_net_conn_title, Snackbar.LENGTH_LONG).show();
         } catch (NullPointerException npe) {
-
+            Log_OC.e(TAG, "Error showing snackbar", npe);
         }
     }
 

src/main/java/com/owncloud/android/ui/preview/PreviewImagePagerAdapter.java

@@ -51,7 +51,6 @@ public class PreviewImagePagerAdapter extends FragmentStatePagerAdapter {
     private Set<Integer> mObsoletePositions;
     private Set<Integer> mDownloadErrors;
     private FileDataStorageManager mStorageManager;
-    private Context mContext;
 
     private Map<Integer, FileFragment> mCachedFragments;
 
@@ -78,7 +77,6 @@ public class PreviewImagePagerAdapter extends FragmentStatePagerAdapter {
             throw new IllegalArgumentException("NULL storage manager");
         }
 
-        mContext = context;
         mAccount = account;
         mStorageManager = storageManager;
         mImageFiles = mStorageManager.getFolderImages(parentFolder, onlyOnDevice);