Fix bookmark listing with mysql: limit is binded as string.
Fix bookmark listing with mysql: limit is binded as string.

behrisch/bookmarks,owncloud/bookmarks,tflidd/bookmarks,alberanid/bookmarks,owncloud/bookmarks,alberanid/bookmarks,behrisch/bookmarks,tflidd/bookmarks,shtrom/bookmarks,shtrom/bookmarks