Fix build without memtest.

install/calculate

@@ -5453,10 +5453,16 @@ sub createiso{
 	}
 
 	#перенесем ядро и меню на флешку
+	my $addsoft;
+	{
+		my $mempath = "$data{tmpdir}/livecd/calculate/boot/memtest86plus/memtest.bin";
+		if(-e $mempath){$addsoft .= "cp -a $mempath $target/$isolinux/memtest &&";}
+	}
+	if(-e /livecd/calculate/boot/memtest86plus/memtest.bin
 	if(system(qq|
 		cp $data{tmpdir}/livecd/calculate/boot/vmlinuz $target/boot/vmlinuz &&
 		cp $data{tmpdir}/livecd/calculate/boot/initrd $target/boot/ &&
-		cp -a $data{tmpdir}/livecd/calculate/boot/memtest86plus/memtest.bin $target/$isolinux/memtest &&
+		$addsoft
 		cp -a $data{tmpdir}/livecd/calculate/usr/share/syslinux/isolinux.bin $target/$isolinux/ &&
 		cp -a $data{tmpdir}/livecd/calculate/usr/share/syslinux/calcmenu.c32 $target/$isolinux/ &&
 		cp $data{tmpdir}/livecd/calculate/boot/boot.jpg $target/$isolinux/ $copyflash