Corrects scissor & viewport initialization. TRAC #11134 Takes viewport/scissor dimensions from surface at first makeCurrent, rather than from display at context construction. Author: Shannon Woods Signed-off-by: Nicolas Capens Signed-off-by: Daniel Koch git-svn-id: https://angleproject.googlecode.com/svn/trunk@58 736b8ea6-26fd-11df-bfd4-992fa37f6226