Additional ImageMagic parameter should be added

As per mail-list discussion:

I needed to convert some room files afterwards. I user command out of
the logs and got for some files an error.

/usr/bin/convert -density 125
/SERVER/webapps/openmeetings/data/upload/files/HASH/HASH.pdf -quality
100 /SERVER/webapps/openmeetings/data/upload/files/HASH/page-%04d.png

convert: profile 'icc': 'RGB ': RGB color space not permitted on
grayscale PNG
`/SERVER/webapps/openmeetings/data/upload/files/HASH/page-%04d.png' @
warning/png.c/MagickPNGWarningHandler/1654.

I needed to add parameter +profile '*' . Now convert is working without
error.

/usr/bin/convert -density 125
/SERVER/webapps/openmeetings/data/upload/files/HASH/HASH.pdf +profile
'*' -quality 100
/usr/lib/red5/webapps/openmeetings/data/upload/files/HASH/page-%04d.png

Greetings Peter