fs: don't close uninitialized fs.watch handle
fs: don't close uninitialized fs.watch handle

Makes uv_close() assert because the uv_fs_event_t struct contains garbage.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node