medialib: Use the `vlc_preparser_GenerateThumbnailToFiles` function
-
Replace
vlc_preparser_GenerateThumbnail
andvlc_picture_Export
byvlc_preparser_GenerateThumbnailToFiles
. -
Fix a crash due to variable on a stack not available when a callback try to use it.
Edited by Gabriel Lafond-Thenaille