Overflow in TypeResolution when calculating base type (undefined behavior)

[ahueck]

Querying type info has an overflow of an unsigned type in getTypeInfo when resolving internal types of structs.

Trigger example

struct Datastruct {
  int start;
  double middle;
  float end;
};  
__typeart_alloc((const void*)&data, 257, 1);
  typeart_status status = typeart_get_type((const void*)&data.middle, &id_result, &count_check);