[Bug 17603] New: winecfg crashes on encountering unknown (incorrect) dll overrides

http://bugs.winehq.org/show_bug.cgi?id=17603

Summary: winecfg crashes on encountering unknown (incorrect) dll
                    overrides
           Product: Wine
           Version: 1.1.16
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: programs
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Created an attachment (id=19771)
 --> (http://bugs.winehq.org/attachment.cgi?id=19771)
0003-Winecfg-doesn-t-segfault-on-unknown-dll-override-mod.patch

When in the registry there is something else than known "native" and "builtin"
keywords entered in dll overrides, winecfg crashes on opening dll override tab.
Attached patch solves the problem.