Hi,

PR 16581:
	GDB crash on inherit_abstract_dies infinite recursion
	https://sourceware.org/bugzilla/show_bug.cgi?id=16581

fixed crash from an infinite recursion.  But in rare cases the new code can
now gdb_assert() due to weird DWARF file.

I do not yet fully understand why the DWARF is as it is but just GDB should
never crash due to invalid DWARF anyway.  The "invalid" DWARF I see only in
Fedora GCC build, not in FSF GCC build, more info at:
	https://bugzilla.redhat.com/show_bug.cgi?id=1069382
	http://people.redhat.com/jkratoch/gcc-debuginfo-4.8.2-7.fc20.x86_64-gnatbind.debug


Thanks,
Jan