empty children not checked

[y-nk]

Got this stacktrace :

[New I/O server worker #1-4] INFO 00:37:11.358 java.lang.NoSuchFieldError: children [New I/O server worker #1-4] INFO 00:37:11.359 at net.pms.external.Search.discoverChildren(Search.java:53)

I think this should be ok with a trycatch or a "!= null" check.

To reproduce it, i only search for any term in any kind of category (song, album, artist, playlist search). Popular playlist looks working, so the streaming process doesnt look broken

Hope this help !