[svn r341] Fix all regressions between [332] and [340]: - fixed assert on empty catch body - fixed(?) typedefed classes in catch specification - fixed assert with catchall Added some documentation.

module bug49;

pragma(LLVM_internal, "notypeinfo")
struct S
{
    int i;
    long l;
}

void main()
{
    S s;
    s.i = 0x__FFFF_FF00;
    s.l = 0xFF00FF_FF00;
    s.i &= s.l;
}