[BUGFIX] Reduced sys_file_processedfile.checksum to correct size

Since only a shortMD5 (of 10 characters length) is used in this field
the size is changed to 10 characters and the field type has been set to
char instead of varchar.

Resolves: #54730
Releases: master, 6.2
Change-Id: I8e846786230b55d42464f6ea791202579e6d7873
Reviewed-on: http://review.typo3.org/36388


Reviewed-by: Ingo Schmitt <is@marketing-factory.de>
Tested-by: Ingo Schmitt <is@marketing-factory.de>
Reviewed-by: Cedric Ziel <cedric@cedric-ziel.com>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>