#3099: Improve toArray calls by using an empty array as parameter.

From Intellij IDEA inspections: Since late updates of OpenJDK 6 this call was intrinsified, making the performance of the empty array version the same and sometimes even better, compared to the pre-sized version.

api/src/main/java/net/md_5/bungee/api/plugin/LibraryLoader.java

@@ -116,7 +116,7 @@ class LibraryLoader
             } );
         }
 
-        URLClassLoader loader = new URLClassLoader( jarFiles.toArray( new URL[ jarFiles.size() ] ) );
+        URLClassLoader loader = new URLClassLoader( jarFiles.toArray( new URL[ 0 ] ) );
 
         return loader;
     }