Fix failing build step

Author: jamesrweb

src/components/ReactP5WrapperGuard.tsx

@@ -8,10 +8,12 @@ import { ReactP5WrapperWithSketch } from "./ReactP5WrapperWithSketch";
 export function ReactP5WrapperGuard<Props extends SketchProps = SketchProps>(
   props: P5WrapperProps<Props>
 ) {
-  if (props.sketch === undefined) {
+  const { sketch, fallback } = props;
+
+  if (sketch === undefined) {
     console.error("[ReactP5Wrapper] The `sketch` prop is required.");
 
-    return props.fallback ?? null;
+    return fallback !== undefined ? <>{fallback}</> : null;
   }
 
   return (

tests/rendering.test.tsx

@@ -94,7 +94,6 @@ describe("Rendering", () => {
   });
 
   it("[General] Should use the fallback UI if the sketch is undefined on initial render", () => {
-    const { sketch } = setupTest();
     const { container } = render(<ReactP5Wrapper fallback={<h1>Oh no</h1>} />);
 
     assert(container.firstElementChild instanceof HTMLHeadingElement);