fix hex2bin for empty input
fix hex2bin for empty input

23n/friendica,anaqreon/redmatrix,sasiflo/hubzilla,tobiasd/friendica,fabrixxm/friendica,friendica/friendica,cutec-chris/friendica,tugelbend/friendica,HaakonME/redmatrix,wave72/hubzilla-dev,tugelbend/friendica,strk/friendica,23n/friendica,beardyunixer/federated-global-directory,redmatrix/hubzilla,waitman/red,unary/redmatrix,habeascodice/redmatrix,git-marijus/hubzilla,mrjive/hubzilla,beardyunixer/redmatrix,git-marijus/hubzilla,friendica/friendica,unary/redmatrix,dawnbreak/hubzilla,friendica/red,wave72/hubzilla-dev,HaakonME/redmatrix,fabrixxm/friendica,anaqreon/redmatrix,zzottel/hubzilla,dawnbreak/hubzilla,dawnbreak/hubzilla,unary/redmatrix,beardyunixer/redmatrix,tobiasd/friendica,encyclomundi/hubzilla,zzottel/hubzilla,HaakonME/hubzilla,zotlabs/hubzilla,phellmes/hubzilla,kenrestivo/hubzilla,kenrestivo/hubzilla,mjfriaza/hubzilla,HaakonME/redmatrix,tugelbend/friendica,waitman/red,wave72/hubzilla-dev,cutec-chris/friendica,mjfriaza/hubzilla,git-marijus/hubzilla,annando/friendica,HaakonME/hubzilla,zotlabs/hubzilla,solstag/redmatrix,redmatrix/redmatrix,beardyunixer/redmatrix,fabrixxm/friendica,HaakonME/redmatrix,kenrestivo/hubzilla,23n/friendica,git-marijus/hubzilla,dawnbreak/redmatrix,HaakonME/redmatrix,mrjive/hubzilla,mjfriaza/hubzilla,zzottel/hubzilla,redmatrix/redmatrix,zotlabs/hubzilla,redmatrix/hubzilla,encyclomundi/hubzilla,git-marijus/hubzilla,solstag/redmatrix,HaakonME/hubzilla,phellmes/hubzilla,waitman/red,redmatrix/redmatrix,phellmes/hubzilla,anaqreon/redmatrix,dawnbreak/hubzilla,HaakonME/hubzilla,anaqreon/hubzilla,HaakonME/hubzilla,anaqreon/hubzilla,kenrestivo/hubzilla,solstag/redmatrix,anaqreon/redmatrix,habeascodice/redmatrix,mjfriaza/hubzilla,solstag/redmatrix,redmatrix/hubzilla,sasiflo/hubzilla,sasiflo/hubzilla,fermionic/friendica,kenrestivo/hubzilla,zzottel/hubzilla,anaqreon/redmatrix,wave72/hubzilla-dev,dissolve/friendica,dissolve/friendica,git-marijus/hubzilla,redmatrix/redmatrix,dawnbreak/hubzilla,TupambaeNet/friendica,fabrixxm/friendica,annando/friendica,mjfriaza/hubzilla,dissolve/friendica,redmatrix/hubzilla,tugelbend/friendica,solstag/redmatrix,beardyunixer/redmatrix,dawnbreak/redmatrix,unary/prate.io,annando/friendica,friendica/friendica,habeascodice/redmatrix,zotlabs/hubzilla,redmatrix/hubzilla,annando/friendica,strk/friendica,beardyunixer/redmatrix,annando/friendica,friendica/red,dissolve/friendica,anaqreon/redmatrix,HaakonME/redmatrix,wave72/hubzilla-dev,beardyunixer/federated-global-directory,dawnbreak/redmatrix,dissolve/friendica,kenrestivo/hubzilla,anaqreon/redmatrix,cutec-chris/friendica,mrjive/hubzilla,zotlabs/hubzilla,HaakonME/redmatrix,wave72/hubzilla-dev,zzottel/hubzilla,HaakonME/hubzilla,dawnbreak/hubzilla,dawnbreak/redmatrix,fermionic/friendica,encyclomundi/hubzilla,unary/redmatrix,beardyunixer/federated-global-directory,phellmes/hubzilla,git-marijus/hubzilla,TupambaeNet/friendica,mrjive/hubzilla,phellmes/hubzilla,anaqreon/hubzilla,encyclomundi/hubzilla,redmatrix/hubzilla,anaqreon/hubzilla,zzottel/hubzilla,strk/friendica,unary/redmatrix,friendica/red,beardyunixer/federated-global-directory,HaakonME/hubzilla,beardyunixer/federated-global-directory,mjfriaza/hubzilla,friendica/red,dawnbreak/redmatrix,fabrixxm/friendica,cutec-chris/friendica,tobiasd/friendica,strk/friendica,kenrestivo/hubzilla,beardyunixer/redmatrix,beardyunixer/redmatrix,dawnbreak/redmatrix,redmatrix/redmatrix,solstag/redmatrix,unary/redmatrix,habeascodice/redmatrix,mrjive/hubzilla,unary/prate.io,sasiflo/hubzilla,beardyunixer/federated-global-directory,redmatrix/redmatrix,tugelbend/friendica,habeascodice/redmatrix,phellmes/hubzilla,anaqreon/hubzilla,fermionic/friendica,mjfriaza/hubzilla,tobiasd/friendica,sasiflo/hubzilla,beardyunixer/federated-global-directory,encyclomundi/hubzilla,solstag/redmatrix,unary/redmatrix,friendica/friendica,phellmes/hubzilla,dawnbreak/redmatrix,sasiflo/hubzilla,friendica/friendica,unary/prate.io,friendica/red,friendica/red,zzottel/hubzilla,TupambaeNet/friendica,strk/friendica,zotlabs/hubzilla,habeascodice/redmatrix,waitman/red,waitman/red,zotlabs/hubzilla,tobiasd/friendica,wave72/hubzilla-dev,anaqreon/hubzilla,mrjive/hubzilla,23n/friendica,encyclomundi/hubzilla,fermionic/friendica,friendica/red,redmatrix/redmatrix,habeascodice/redmatrix,encyclomundi/hubzilla