Register /dev/zero too

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1240 42af7a65-404d-4744-a932-0658087f49c3

arch/sim/src/up_initialize.c

@@ -94,6 +94,7 @@ void up_initialize(void)
   /* Register devices */
 
   devnull_register();       /* Standard /dev/null */
+  devzero_register();       /* Standard /dev/zero */
   up_devconsole();          /* Our private /dev/console */
 #if defined(CONFIG_FS_FAT) && !defined(CONFIG_DISABLE_MOUNTPOINT)
   up_registerblockdevice(); /* Our FAT ramdisk at /dev/ram0 */