check_qualified_type

[Martin Uecker via Gcc]

I am trying to understand what check_qualified_type
does exactly. The direct comparison of TYPE_NAMES seems incorrect
for C and its use is c_update_type_canonical then causes
PR114930 and PR115502.  In the later function I think
it is not really needed and I guess one could simply remove
it, but I wonder if it works incorrectly in other cases 
too?


Martin