AlanQuatermain/AQGridView — pull request #113 by xuzhe (2012-02-05 08:09:02+00:00)
Title: layout all cells after HeaderView's height was changed

Some times the HeaderView's height will be changed, after that I will call [gridView setNeedsLayout] to relayout.

This commit fixed the problem that the layoutSubviews method did not notice the height of headView changed.