Regression : Drag'n'Drop pagefile.sys fails but creates empty folders of the same name

reactos-bootcd-0.4.15-dev-7390-gafb132a-x86-gcc-lin-dbg

This is a complement to CORE-19211 which focussed on non-filesystem objects

• Open Explorer in C: drive and with system protected files made visible in settings
• Drag'n'drop pagefile.sys on the Desktop ("move" operation, as "copy" is not affected)
•  En empty folder of the same name is created.
• Expected result (similar to Win2K3) : move fails gracefully (at SHFileOperationW level) without creating empty folder
• The copy operations fails gracefully thanks to the following check that exists in copy_files and not in move_files. Due to this lack of check (1st problem), move_to_dir calls move_dir_to_dir due to wrong management of INVALID_FILE_ATTRIBUTES (2nd problem), which leads to the creation of a folder named "pagefile.sys".
• This is caused by GetFileAttributesW returning INVALID_FILE_ATTRIBUTES on "c:\pagefile.sys" which is as expected

if (flFrom->bAnyDontExist)

        return ERROR_SHELL_INTERNAL_FILE_NOT_FOUND; 

Solution is : 

• To add the bAnyDontExist check in move_files as in copy_files
• To add a check in move_to_dir against INVALID_FILE_ATTRIBUTES to avoid creating a folder "by default" if passed with invalid file

Fixed by : dragdropfixpart2.patch