kontrolapi: fix a empty slice indexing
kontrolapi: fix a empty slice indexing

This was caused when mongo returns an empty string (which can be happen afaik)

jack89129/koding,drewsetski/koding,alex-ionochkin/koding,mertaytore/koding,kwagdy/koding-1,gokmen/koding,koding/koding,jack89129/koding,koding/koding,usirin/koding,usirin/koding,alex-ionochkin/koding,szkl/koding,mertaytore/koding,mertaytore/koding,acbodine/koding,rjeczalik/koding,szkl/koding,jack89129/koding,szkl/koding,sinan/koding,gokmen/koding,acbodine/koding,gokmen/koding,cihangir/koding,andrewjcasal/koding,koding/koding,usirin/koding,cihangir/koding,sinan/koding,acbodine/koding,alex-ionochkin/koding,szkl/koding,kwagdy/koding-1,rjeczalik/koding,alex-ionochkin/koding,drewsetski/koding,szkl/koding,usirin/koding,usirin/koding,acbodine/koding,gokmen/koding,andrewjcasal/koding,rjeczalik/koding,kwagdy/koding-1,mertaytore/koding,acbodine/koding,mertaytore/koding,szkl/koding,drewsetski/koding,jack89129/koding,kwagdy/koding-1,rjeczalik/koding,drewsetski/koding,mertaytore/koding,kwagdy/koding-1,usirin/koding,drewsetski/koding,drewsetski/koding,koding/koding,rjeczalik/koding,mertaytore/koding,acbodine/koding,rjeczalik/koding,kwagdy/koding-1,gokmen/koding,acbodine/koding,cihangir/koding,mertaytore/koding,gokmen/koding,andrewjcasal/koding,andrewjcasal/koding,sinan/koding,andrewjcasal/koding,koding/koding,jack89129/koding,cihangir/koding,cihangir/koding,kwagdy/koding-1,sinan/koding,gokmen/koding,usirin/koding,andrewjcasal/koding,gokmen/koding,alex-ionochkin/koding,szkl/koding,jack89129/koding,sinan/koding,cihangir/koding,sinan/koding,koding/koding,alex-ionochkin/koding,koding/koding,usirin/koding,jack89129/koding,andrewjcasal/koding,acbodine/koding,cihangir/koding,jack89129/koding,sinan/koding,drewsetski/koding,rjeczalik/koding,koding/koding,kwagdy/koding-1,rjeczalik/koding,cihangir/koding,alex-ionochkin/koding,sinan/koding,szkl/koding,andrewjcasal/koding,alex-ionochkin/koding,drewsetski/koding