Your rtti.c changes broke some obj-c++ tests

[Giovanni Bajo]

Nathan,

I see some failures in the testsuite which appear to be related by your recent
changes to rtti.c (VECification). For instance:

FAIL: obj-c++.dg/basic.mm (test for excess errors)
Excess errors:/home/rasky/gcc/mainline/gcc/libstdc++-v3/libsupc++/exception:55:
internal compiler error: vector VEC(tinfo_s,base) index domain error, in
get_tinfo_decl at cp/rtti.c:373

Would you please check and possibly fix this?

Thanks,
Giovanni Bajo