Merge pull request #314 from tsuoranta/fix-readbuffer

[gl.xml] Add GL_NONE to ReadBufferMode
diff --git a/xml/gl.xml b/xml/gl.xml
index 1f1180d..14d02ec 100644
--- a/xml/gl.xml
+++ b/xml/gl.xml
@@ -2940,6 +2940,8 @@
         </group>
 
         <group name="ReadBufferMode">
+            <enum name="GL_NONE"/>
+            <enum name="GL_NONE_OES"/>
             <enum name="GL_AUX0"/>
             <enum name="GL_AUX1"/>
             <enum name="GL_AUX2"/>