is used by mapfish and others, the google map can get confused as to its size
and not resize correctly. This patch changes that so that the check happens on
moveTo, so we know if the map has resized. The checkResize is a cheap call in
the default case. r=me, patch by gregers, (Closes#1797)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@8990 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf