do not process update activity if there is no item to update and simplify code a little
do not process update activity if there is no item to update and simplify code a little

sasiflo/hubzilla,mjfriaza/hubzilla,redmatrix/hubzilla,wave72/hubzilla-dev,anaqreon/hubzilla,encyclomundi/hubzilla,zotlabs/hubzilla,phellmes/hubzilla,sasiflo/hubzilla,redmatrix/hubzilla,phellmes/hubzilla,anaqreon/hubzilla,zotlabs/hubzilla,mrjive/hubzilla,redmatrix/hubzilla,HaakonME/hubzilla,encyclomundi/hubzilla,phellmes/hubzilla,mrjive/hubzilla,dawnbreak/hubzilla,HaakonME/hubzilla,anaqreon/hubzilla,sasiflo/hubzilla,mrjive/hubzilla,mjfriaza/hubzilla,phellmes/hubzilla,mrjive/hubzilla,git-marijus/hubzilla,wave72/hubzilla-dev,encyclomundi/hubzilla,wave72/hubzilla-dev,mjfriaza/hubzilla,wave72/hubzilla-dev,encyclomundi/hubzilla,HaakonME/hubzilla,dawnbreak/hubzilla,git-marijus/hubzilla,phellmes/hubzilla,anaqreon/hubzilla,zotlabs/hubzilla,git-marijus/hubzilla,mjfriaza/hubzilla,HaakonME/hubzilla,sasiflo/hubzilla,mrjive/hubzilla,dawnbreak/hubzilla,dawnbreak/hubzilla,mjfriaza/hubzilla,HaakonME/hubzilla,git-marijus/hubzilla,git-marijus/hubzilla,zotlabs/hubzilla,anaqreon/hubzilla,zotlabs/hubzilla,mrjive/hubzilla,wave72/hubzilla-dev,sasiflo/hubzilla,encyclomundi/hubzilla,git-marijus/hubzilla,git-marijus/hubzilla,mjfriaza/hubzilla,phellmes/hubzilla,HaakonME/hubzilla,HaakonME/hubzilla,anaqreon/hubzilla,phellmes/hubzilla,zotlabs/hubzilla,redmatrix/hubzilla,dawnbreak/hubzilla,encyclomundi/hubzilla,encyclomundi/hubzilla,zotlabs/hubzilla,dawnbreak/hubzilla,redmatrix/hubzilla,wave72/hubzilla-dev,sasiflo/hubzilla,wave72/hubzilla-dev,redmatrix/hubzilla,mjfriaza/hubzilla