fix: add script block only when there are imports to add (#14604)

Author: benmccann

.changeset/lazy-eyes-enjoy.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/enhanced-img': patch
+---
+
+fix: add script block only when there are imports to add

packages/enhanced-img/src/vite-plugin.js

@@ -163,18 +163,18 @@ export function image_plugin(imagetools_plugin) {
 				await Promise.all(pending_ast_updates);
 
 				// add imports
-				let text = '';
 				if (imports.size) {
+					let text = '';
 					for (const [path, import_name] of imports.entries()) {
 						text += `\timport ${import_name} from "${path}";\n`;
 					}
-				}
 
-				if (ast.instance) {
-					// @ts-ignore
-					s.appendLeft(ast.instance.content.start, text);
-				} else {
-					s.prepend(`<script>${text}</script>\n`);
+					if (ast.instance) {
+						// @ts-ignore
+						s.appendLeft(ast.instance.content.start, text);
+					} else {
+						s.prepend(`<script>${text}</script>\n`);
+					}
 				}
 
 				if (ast.css) {