[PATCH v4] gprof: only process line numbers for intersection of vmas and histograms

[Richard Allen]

>The profile data is written out with..

I was worried about other sources of gmon files, but
checked a few other systems, and all wrote histograms
first too, so it sounds fine to me.

I've noticed that some of my profiles have discrepancies
with the change to limit to histogram range parsing,
usually of no more than 2-3 bytes. I don't think this was
anything you've caused.