Patch to fix crash on mingw and nil-typenames.

[Tom Tromey]

>>>>> "Joost" == Joost van der Sluis <joost@cnoc.nl> writes:

Joost> 2011-10-12  Joost van der Sluis  <joost@cnoc.nl>
Joost>         * gdbtypes.h Added TYPE_SAFE_NAME macro to get the name of a 
Joost>         type or "<unnamed type"> when there is no name assigned. 
Joost>         * gnu-v3-abi.c (gnuv3_rtti_type): Use TYPE_SAFE_NAME macro to
Joost>         avoid a sigint when no name is assigned.

This is ok.

Tom