[Bug 10345] New: ShellExecute with very long params crashes (affects Picasa )

http://bugs.winehq.org/show_bug.cgi?id=10345

Summary: ShellExecute with very long params crashes (affects
                    Picasa)
           Product: Wine
           Version: 0.9.20.
          Platform: Other
               URL: http://dl.google.com/picasa/picasaweb-current-setup.exe
        OS/Version: other
            Status: NEW
          Keywords: download
          Severity: normal
          Priority: P2
         Component: wine-shell32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

With current Windows picasa, some users reported a crash
caused by overflow of a fixed-size buffer in SHELL_execute().
That buffer size is still fixed and small in current git (I think).

To repeat:
1. Launch picasa, select a folder.
2. Login to Picasa 'Web Albums', click on 'Web Album' button in display tray.
3. 'Send n photos to a Picasa Web Album' dialog is opened.
4. Click on 'Upgrade storage...' button.  It crashes on some machines.

On those machines, the following err is seen:
err:exec:SHELL_execute Parameters exceeds buffer size (1126 > 1024) 
SHELL_execute is 350 lines long (yargh!), which makes a proper fix
a bit of a challenge, but bumping up the size of one of the buffers in
that function does make the problem go away.

On a machine that doesn't crash, the parameter being passed to winebrowser is 
900 or so bytes long, which is still perilously close to the 1024 byte limit.
For reference, here's what +relay shows for that call.
0009:Call shell32.ShellExecuteA(00000000,008c5f98 "open",00ca692c
"c:\windows\system32\winebrowser.exe",01e247e4
""https://www.google.com/accounts/TokenAuth?auth=xhF6GxYBAAA,.2VMY_71Prxa88heF...)
ret=00703902