wrong consistency check in domaion.cpp on ni when data_dim=1

[ssenesi]

domain.cpp reads at line 730 :

      if ((ni.getValue() < 0 || ibegin.getValue() < 0) ||
         ((type_attr::unstructured != type) && ((ibegin.getValue() + ni.getValue()) > ni_glo.getValue())))

while it should be:

      if ((ni.getValue() < 0 || ibegin.getValue() < 0) ||
         ((data_dim.get(Value()== 2 && ((ibegin.getValue() + ni.getValue()) > ni_glo.getValue())))

as you can have data_dim=1 and e.g. type=curvilinear, which breaks the relationship between ni and ni_glo.
Another formulation would be to use as a ceiling value for ni :

• ni_glo if data_dim==2
• ni_glo * nj_glo if data_dim==1

[mhnguyen]

This ticket can be considered an enhancement for XIOS.
There should not be a direct connection between the distribution of a domain (defined with ?begin/n? or ?_index) and the way to access data on domain (defined with data_*). So I chose to loosen the checking condition for ?begin/n? and ?_index. This way allows us to do more flexible things.