Fix for error output on invalid user ID to api groups list
Fix for error output on invalid user ID to api groups list

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