Fix an overflow issue when a static buffer is invalidated. Issue=104,139,179 TRAC #15143 Signed-off-by: Daniel Koch Author: Nicolas Capens Original-patch-by: Yore Apex git-svn-id: https://angleproject.googlecode.com/svn/trunk@702 736b8ea6-26fd-11df-bfd4-992fa37f6226