Vidgrind panics when there is no media and you search

[Scott Barnard]

Vidgrind panics because it is accessing the 0th element of an empty array. This happens in the search.go file and is caused by a previous commit.

Commit that causes the problem:

commit d97ed06f941d7ebf8d580de8ecec21d476485564 (mjpeg-easy-download)
Author: Scott [e-mail]
Date: Fri Jan 3 14:31:39 2020 +1030

[Alan Noble]

Resolved in https://bitbucket.org/ausocean/vidgrind/commits/71823af7e1006bf4b6db8e27406cff832f9a12a3