renamed variable

lib/single-file/single-file-core.js

@@ -1311,11 +1311,11 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 							if (!Util.testIgnoredPath(resourceURL)) {
 								if (Util.testValidURL(resourceURL, baseURI, options.url)) {
 									let { content } = await batchRequest.addURL(resourceURL, true);
-									let validResource = content == EMPTY_DATA_URI || content.startsWith(PREFIX_DATA_URI_VND) || content.startsWith(PREFIX_DATA_URI_IMAGE_SVG);
-									if (!validResource) {
-										validResource = await DocUtil.validFont(urlFunction);
+									let invalidResource = content == EMPTY_DATA_URI || content.startsWith(PREFIX_DATA_URI_VND) || content.startsWith(PREFIX_DATA_URI_IMAGE_SVG);
+									if (!invalidResource) {
+										invalidResource = !(await DocUtil.validFont(urlFunction));
 									}
-									if (!validResource) {
+									if (invalidResource) {
 										content = EMPTY_DATA_URI;
 									}
 									declaration.value.children.forEach(token => {