Fix loadlib.

src/core/org/luaj/vm2/lib/PackageLib.java

@@ -236,7 +236,7 @@ public class PackageLib extends TwoArgFunction {
 	}
 
 	public static class loadlib extends VarArgFunction {
-		public Varargs loadlib( Varargs args ) {
+		public Varargs invoke( Varargs args ) {
 			args.checkstring(1);
 			return varargsOf(NIL, valueOf("dynamic libraries not enabled"), valueOf("absent"));
 		}