Minor fixes

modules/mournblade-actor.js

@@ -412,6 +412,11 @@ export class MournbladeActor extends Actor {
 
   /* -------------------------------------------- */
   async rollRune(runeId) {    
+    let comp = this.items.find(comp => comp.type == "competence" && comp.name.toLowerCase() == "savoir : runes")
+    if ( !comp) {
+      ui.notifications.warn("La compétence Savoirs : Runes n'a pas été trouvée, abandon.")
+      return
+    }
     let rollData = this.getCommonRollData("cla", undefined, "Savoir : Runes")
     rollData.rune =  duplicate(this.items.get(runeId) || {})
     rollData.difficulte = rollData.rune?.system?.seuil || 0