Need to handle Rogue Poison profession correctly

[Kernighan Ritchie]

In Classic, Rogues have a class specific poison profession. Opening it currently generates the following error:

Message: Interface\AddOns\RecipeRadarClassic\SkillDB.lua:101: attempt to index field '?' (a nil value)
Time: Mon Sep  9 22:17:24 2019
Count: 3
Stack: Interface\AddOns\RecipeRadarClassic\SkillDB.lua:101: attempt to index field '?' (a nil value)
[C]: ?
Interface\AddOns\RecipeRadarClassic\SkillDB.lua:101: in function `RecipeRadar_SkillDB_Refresh'
...ace\AddOns\RecipeRadarClassic\RecipeRadarClassic.lua:202: in function `RecipeRadar_OnEvent'
[string "*:OnEvent"]:1: in function <[string "*:OnEvent"]:1>

Locals: 

[Kernighan Ritchie]

fix #11 - Add Poisons profession from rogues

→ <<cset 3cc1cb852e64>>