subtract ap when casting spell

Changes:
 + subtract AP when casting a spell

source/module/items/M5Item.ts

@@ -215,6 +215,12 @@ export class M5Item extends Item {
 				}
 			});
 
+			if (item.type === "spell" || item.type === "kampfkunst") {
+				if (this.actor["system"].ap.value >= item.system.ap) {
+					this.actor["system"].ap.value -= item.system.ap;
+				}
+			}
+
 			const roll = new M5Roll(rollData, this.actor, item.name);
 			return roll.toMessage();
 		} else {