Scripts/Commands: Fix crash in ".kick" command

Fix a NULL dereference exception happening when using .kick command caused by a strtok(NULL) call without a previous call to the string to be tokenized.
Issue added in 101cad1f2872a87be925b74b9d17760381bb9808
Scripts/TheStormPeaks: Possible crash fix

Apply safe NULL checks added in 7d881a073961887d446d4430905f315b52928bb1 to similar code in same script
Merge remote-tracking branch 'trinitycore/master'