Adjusted the math for computing lineHeight slightly. This appears to result in results that are slightly more consistent when compared with iOS. Different fonts means that the results will likely never be perfect, however this subtle rounding difference appears to result in a few button labels lining up better with their iOS counterparts and thus avoiding a number of little off-by-one adjustments on the Mac.
Adjusted the math for computing lineHeight slightly. This appears to result in results that are slightly more consistent when compared with iOS. Different fonts means that the results will likely never be perfect, however this subtle rounding difference appears to result in a few button labels lining up better with their iOS counterparts and thus avoiding a number of little off-by-one adjustments on the Mac.

git-svn-id: bd932d20d2c32fb1124b4590cfef0a39e17bad6e@5504 d3437ac4-8b1b-0410-be28-b75ab53cb89f

jterhorst/Chameleon