fix regression in group join approval due to refactoring (forgot to remove a param)
fix regression in group join approval due to refactoring (forgot to remove a param)

sikevux/bsk-social,studio666/gnu-social,sikevux/bsk-social,foocorp/gnu-social,d3vgru/StatusNet,eXcomm/gnu-social,charnimda/lgbtpzn-social,faulteh/gnu-social,gnusocial/mainline,furtherfield/gnu-social,eXcomm/gnu-social,furtherfield/gnu-social,Piratas/tortuga,chimo/social,bankonme/gnu-social,charlycoste/StatusNet,chimo/social,faulteh/gnu-social,foocorp/gnu-social,charlycoste/StatusNet,eXcomm/gnu-social,Piratas/tortuga,faulteh/gnu-social,csarven/statusnet,bankonme/gnu-social,charnimda/lgbtpzn-social,zcopley/StatusNet,bankonme/gnu-social,chimo/social,foocorp/gnu-social,UngPirat/freesocial,xebia/statusnet-oauth2,d3vgru/StatusNet,UngPirat/freesocial,gnusocial/mainline,minmb/statusnet,csarven/statusnet,xebia/statusnet-oauth2,zcopley/StatusNet,minmb/statusnet,eXcomm/gnu-social,zcopley/StatusNet,csarven/statusnet,furtherfield/gnu-social,xebia/statusnet-oauth2,d3vgru/StatusNet,charnimda/lgbtpzn-social,faulteh/gnu-social,Piratas/tortuga,gnusocial/mainline,sikevux/bsk-social,Piratas/tortuga,minmb/statusnet,gnusocial/mainline,UngPirat/freesocial,studio666/gnu-social,csarven/statusnet,bankonme/gnu-social,studio666/gnu-social,sikevux/bsk-social,studio666/gnu-social,charlycoste/StatusNet,furtherfield/gnu-social