[KaWeNGoD]

Yes, there are more typos is better to change lines:
108: GUI_NewField(SkillMgr.editwindow_gathering.name,strings[gCurrentLanguage].nodeHas,"SKM_Item","SkillDetails");
237: elseif ( k == "SKM_Item" ) then SkillMgr.SkillProfile[SKM_Prio].hasitem = v
405: string2write = string2write.."SKM_Item="..skill.hasitem.."\n"
512: elseif ( key == "Item" ) then newskill.hasitem = tostring(value)
720: SKM_Item = skill.hasitem or ""

OR:
108: GUI_NewField(SkillMgr.editwindow_gathering.name,strings[gCurrentLanguage].nodeHas,"SKM_ITEM","SkillDetails");
237: elseif ( k == "SKM_ITEM" ) then SkillMgr.SkillProfile[SKM_Prio].hasitem = v
405: string2write = string2write.."SKM_ITEM="..skill.hasitem.."\n"
512: elseif ( key == "ITEM" ) then newskill.hasitem = tostring(value)
720: SKM_ITEM = skill.hasitem or ""