Mesa (master): mesa: add an assertion in _mesa_enable_vertex_array_attrib()

[Brian Paul]

Module: Mesa
Branch: master
Commit: 4ab7e03e1fc7ac6c7cd3a5a1c160726f2a262e66
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4ab7e03e1fc7ac6c7cd3a5a1c160726f2a262e66

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Jan 26 11:03:57 2018 -0700

mesa: add an assertion in _mesa_enable_vertex_array_attrib()

Some of the enable/disable vertex array functions take a zero-based
generic index, while others take a VERT_ATTRIB_GENERIC0-based value.
Add an assertion to clarify that in one place.

Reviewed-by: Gert Wollny <gw.fossdev at gmail.com>

---

 src/mesa/main/varray.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mesa/main/varray.c b/src/mesa/main/varray.c
index 31f1c8339d..bda1c5a3b6 100644
--- a/src/mesa/main/varray.c
+++ b/src/mesa/main/varray.c
@@ -1064,6 +1064,7 @@ _mesa_enable_vertex_array_attrib(struct gl_context *ctx,
                                  struct gl_vertex_array_object *vao,
                                  unsigned attrib)
 {
+   assert(attrib >= VERT_ATTRIB_GENERIC0);
    assert(attrib < ARRAY_SIZE(vao->VertexAttrib));
 
    if (!vao->VertexAttrib[attrib].Enabled) {