Vladimir,

I think vsrinivas is trying update the code base such that the change only has to be made once.  Your suggestion is to add the patches to the pkgsrc package (rather than the FreeBSD port) and leave the code base alone, and risk that the patches eventually stop working. 

If it's not possible to fix the code base, fine, your suggestion would work as a last resort, but it's better to attempt to fix it properly.