reproducible segfault

[purpleidea]

Easy to reproduce:

1. Connect to the thing
2. Run searchusers help (in the msg slack dialog)
3. Run scrollback help

Panic below occurs.
Using current git master on latest Centos 7.x

HTH

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x83e942]

goroutine 109 [running]:
github.com/42wim/matterircd/vendor/github.com/42wim/mm-go-irckit.searchUsers(0xc4201d8000, 0xc4201d8280, 0xc4200fa330, 0x1, 0x1, 0xc42041c038, 0x5)
        /home/james/code/gopath/src/github.com/42wim/matterircd/vendor/github.com/42wim/mm-go-irckit/mmservice.go:192 +0xf2
github.com/42wim/matterircd/vendor/github.com/42wim/mm-go-irckit.(*User).handleServiceBot(0xc4201d8000, 0xc42041c038, 0x5, 0xc4201d8280, 0xc420562160, 0x10)
        /home/james/code/gopath/src/github.com/42wim/matterircd/vendor/github.com/42wim/mm-go-irckit/mmservice.go:294 +0x3c1
created by github.com/42wim/matterircd/vendor/github.com/42wim/mm-go-irckit.CmdPrivMsg  
        /home/james/code/gopath/src/github.com/42wim/matterircd/vendor/github.com/42wim/mm-go-irckit/server_commands.go:455 +0xd73