Add warning to variables

src/common/rpg/components/variables.ts

@@ -35,6 +35,8 @@ export class Variables extends Component {
         const currentValue = this.variables[key] ?? 0;
         if (typeof currentValue === 'number' && typeof value === 'number') {
             this.set({ key, value: currentValue + value });
+        } else {
+            console.warn(`[Variables] increment failed: ${key} is not a number`);
         }
         return this.variables;
     }