Fix null skillset runtimes on new_player

Author: out-of-phaze

code/datums/mind/mind.dm

@@ -225,7 +225,7 @@
 			assigned_job = job
 			assigned_role = job.title
 			role_alt_title = new_role
-			if(current)
+			if(current?.skillset)
 				current.skillset.obtain_from_client(job, current.client)
 
 	else if (href_list["amb_edit"])

code/modules/client/preference_setup/occupation/occupation.dm

@@ -185,7 +185,7 @@
 					skill_link = "<a href='byond://?src=\ref[src];set_skills=[title]'>View Skills</a>"
 				skill_link = "<td>[skill_link]</td>"
 
-				if(!user.skillset.skills_transferable)
+				if(!user.skillset?.skills_transferable)
 					skill_link = ""
 
 				// Begin assembling the actual HTML.

code/modules/mob/skills/skillset.dm

@@ -38,7 +38,7 @@ var/global/list/all_skill_verbs
 		. += SB.buffs[skill_path]
 
 /datum/skillset/proc/obtain_from_mob(mob/living/mob)
-	if(!istype(mob) || !skills_transferable || !mob.skillset.skills_transferable)
+	if(!istype(mob) || !skills_transferable || !mob.skillset?.skills_transferable)
 		return
 	skill_list = mob.skillset.skill_list
 	default_value = mob.skillset.default_value