Add EXT_vertex_cull support to mesa
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index 64cc4d1..25bb793 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -290,6 +290,15 @@
          FLUSH_VERTICES(ctx, _NEW_POLYGON);
          ctx->Polygon.CullFlag = state;
          break;
+
+      case GL_CULL_VERTEX_EXT:
+         CHECK_EXTENSION(EXT_cull_vertex, cap);
+         if (ctx->Transform.CullVertexFlag == state)
+            return;
+         FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
+         ctx->Transform.CullVertexFlag = state;
+         break;
+
       case GL_DEPTH_TEST:
          if (state && ctx->Visual.depthBits==0) {
             _mesa_warning(ctx,"glEnable(GL_DEPTH_TEST) but no depth buffer");