* Commit 9dc045a701 introduced a regression on account that we didn't set the
file pointer to 0 before clearing the disk.
* This leads to the MBR not being properly cleared, with the result that Windows may in turn
produce errors when trying to repartition the disk.
* Fix this by making sure we do invoke SetFilePointerEx() before calling WriteFileWithRetry().
* Also set rufus-next to 3.17
* Also fix a MinGW warning