Don't rely on (potentially) unsupported vertex attribute types. TRAC #11391 Checks for optional vertex declaration formats and falls back to FLOAT1-4 if more direct formats are not supporte Signed-off-by: Nicolas Capens Signed-off-by: Daniel Koch Author: Andrew Lewycky git-svn-id: https://angleproject.googlecode.com/svn/trunk@330 736b8ea6-26fd-11df-bfd4-992fa37f6226