[mythtv] [PATCH] Micropatch to mythgallery, correct moveLeft behaviour

[Leandro Dardini]

I start using mythgallery and found that hitting "left" on the first
thumbnail of the first row of the first screenposition, make the highlight
box appear on the extreme right. This behaviour can be correct, but it is
not the same behaviour when hitting right on the last thumbnail of the last
row of the last screenposition.
However the "big" problem arise when you have less than three images and
hitting left of the first, make the highlight box disappear.

The enclosed micropatch correct this behaviour turning off the wrapping of
moveLeft.

Leandro
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