use JavaPlugin.getResource() instead of JarFile.getEntry()

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/WorldEditPlugin.java

@@ -440,10 +440,10 @@ public class WorldEditPlugin extends JavaPlugin { //implements TabCompleter
     protected void createDefaultConfiguration(String name) {
         File actual = new File(getDataFolder(), name);
         if (!actual.exists()) {
-            try (JarFile file = new JarFile(getFile())) {
-                ZipEntry copy = file.getEntry("defaults/" + name);
-                if (copy == null) throw new FileNotFoundException();
-                copyDefaultConfig(file.getInputStream(copy), actual, name);
+            try {
+                InputStream stream = getResource("defaults/" + name);
+                if (stream == null) throw new FileNotFoundException();
+                copyDefaultConfig(stream, actual, name);
             } catch (IOException e) {
                 getLogger().severe("Unable to read default configuration: " + name);
             }