Correctly compare versions > x.9

[gtback]

There is at least one place that we compare versions/branches as strings. This will do the wrong thing when we start building 7.10, since 7.9 > 7.10 and "7.9" > "7.10" in Perl.

Also, look for other places that might be doing this.

[gtback]

I confirmed this was the only place that was doing this, and fixed it in #1949. I'm going to close this, but if anything strange happens around the time of 7.10 feature freeze, I'll investigate.