Generate sidx box only if there are more than one entries
Generate sidx box only if there are more than one entries

Change-Id: If7d7440f18e8b50a3261e18138b1a40bd754aba7

leandromoreira/edash-packager,leandromoreira/edash-packager,leandromoreira/edash-packager,nevil/edash-packager,leandromoreira/edash-packager,nevil/edash-packager,nevil/edash-packager,leandromoreira/edash-packager