Recompiling a single arch package

[Peter S Galbraith <rhogee@mixing.qc.dfo.ca>]

I posted about which g++ compiler I should be using to build for
potato (although I run slink).

Now it occurs to me that if I rebuild my package and bump up the
debian version number, then other archs will need to rebuild too
even thought I have not changed a thing in source.

e.g. gri_2.2.1-2.diff.gz will be identical to gri_2.2.1-1.diff.gz 
except for the changelog file.

Is that the proper thing to do?

Thanks,
Peter