[mythtv] Exif tags: orientation is not always in English

[Emmanuel]

    Hi all,
I stumbled across this when using mythgallery: some pictures were not 
correctly displayed, they were turned 90 degrees on the left or on the 
right. It turned out that this is because my reflex puts the exif 
orientation tag in french! So the code in galleryutil.cpp is called but 
always returns 0 degree angle as it checks only against "left - bottom" 
not "gauche - bas".
I could check code from other projects to see how this is handled and 
try to come up with a patch if people think this is of interest. We can 
at least now warn people using localized cameras.
Bye
Manu