Fix bug due to ClassNode no longer having toString

Author: rcx

src/main/java/club/bytecode/the/jda/JDA.java

@@ -259,7 +259,7 @@ public static byte[] dumpClassToBytes(ClassNode cn) {
     public static final String HACK_PREFIX = "\0JDA-hack";
 
     public static File getClassFileProxy(ClassNode cn) {
-        return new File('/' + HACK_PREFIX, cn + ".class");
+        return new File('/' + HACK_PREFIX, cn.name + ".class");
     }
 
     public static String extractProxyClassName(String fileName) {

src/main/java/club/bytecode/the/jda/decompilers/FernflowerDecompiler.java

@@ -76,7 +76,7 @@ public String decompileClassNode(FileContainer container, final ClassNode cn) {
                     requestedCn = container.loadClassFile(container.findClassfile(className));
                     if (requestedCn == null) {
                         System.err.println("Couldn't load " + externalPath);
-                        throw new IOException(container + "$" + cn + " is missing");
+                        throw new IOException(container + "$" + cn.name + " is missing");
                     }
                     applyFilters(requestedCn);
                     classCache.put(className, requestedCn);