can't be determined from the baselayer yet. This is the case in Google,
because Google can't call getLatLonFromPx until after setCenter has been
called, which comes after this. There may be some cases where this isn't
a perfect fix, but we're going to fix this for now, and punt on further
testing until 2.3.
git-svn-id: http://svn.openlayers.org/trunk/openlayers@1778 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
7ecc62e55a