Bug#778866: read in movie-title failing

[Sean Ellefson]

Control: tags -1 +patch

Was able to reproduce bug: `movie-title` terminates on error generated by
`read` due to `set -e` on line where it attempts to read title card
dimensions generated by `identify`.  Unsure why `read` failed in the way
that it does, couldn't reproduce from /bin/sh on my local system, but
explicitly setting variables seems to workaround it.  Attached patch
adjusts accordingly.

`movie-title` still exits with an error after attempting to run:

convert -depth 8 -matte -colorspace Transparent -type PaletteMatte
/usr/share/videotrans/null.png -background 'rgba(0,0,0,0)' -splice
719x575+0+0 -draw @/tmp/.movie-title.25938.convert title.vob-overlay.png

Error message:

convert: Valid palette required for paletted images `title.vob-overlay.png'
@ error/png.c/MagickPNGErrorHandler/1645.

-- 

Sean Ellefson
Helpdesk Consultant - User Support Services
Office of Information Technologies
Portland State University
Phone: 503-725-8751
scellef at pdx.edu
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