Christophe CURIS 9a0c3ab737 wrlib: light changes to the code for ImageMagick ...

- changed header used for MagickWand to the one specified in the online
documentation

- changed a comparison to 'MagickTrue' because its value does not allow a
compiler optimisation that would be expected in present case

- fixed potential crash, if loading with Magick fails it could return a
pointer to a de-allocated area

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>

2014-05-08 20:14:21 +01:00

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