setup: hang when lost focus

[Németh Márton]

Hi!

Using the setup.exe 2.457.2.2 the program is hanging if the window is
moved while MD5-checking the packages.

Steps to reproduce:

1. start setup.exe
2. click Next
3. Select Install from Local Directory
4. click Next
5. Root Dir: C:\prg\cygwin
    Install For All Users
    Default Text File Type: Unix
    click Next
6. Click Next
7. When the "Checking MD5 for ..." appears raise
    an other window on top of the setup's window,
    changing back and the setup is frozen.

Op. Sys.: Windows XP SP2 HUN

	NMarci