fixed removal of media at rules

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

@@ -1230,11 +1230,11 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 			const removedRules = [];
 			for (let cssRule = cssRules.head; cssRule; cssRule = cssRule.next) {
 				const ruleData = cssRule.data;
-				if (ruleData.block && ruleData.block.children) {
+				if (ruleData.type == "Atrule" && ruleData.name == "charset") {
+					removedRules.push(cssRule);
+				} else if (ruleData.block && ruleData.block.children) {
 					if (ruleData.type == "Rule") {
 						promises.push(this.processStyle(ruleData.block.children.toArray(), baseURI, options, cssVariables, batchRequest));
-					} else if (ruleData.type == "Atrule" && ruleData.name == "charset") {
-						removedRules.push(cssRule);
 					} else if (ruleData.type == "Atrule" && (ruleData.name == "media" || ruleData.name == "supports")) {
 						promises.push(this.processStylesheet(ruleData.block.children, baseURI, options, cssVariables, batchRequest));
 					} else if (ruleData.type == "Atrule" && ruleData.name == "font-face") {