mesa_glinterop: s/struct_version/version/

OCD polish for consistency with other mesa interfaces.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Tom Stellard <thomas.stellard@amd.com>

src/gallium/state_trackers/dri/dri2.c

@@ -1468,7 +1468,7 @@ dri2_interop_query_device_info(__DRIcontext *_ctx,
 {
    struct pipe_screen *screen = dri_context(_ctx)->st->pipe->screen;
 
-   if (!out->struct_version)
+   if (!out->version)
       return MESA_GLINTEROP_INVALID_VALUE;
 
    out->pci_segment_group = screen->get_param(screen, PIPE_CAP_PCI_GROUP);
@@ -1497,7 +1497,7 @@ dri2_interop_export_object(__DRIcontext *_ctx,
    unsigned target, usage;
    boolean success;
 
-   if (!in->struct_version || !out->struct_version)
+   if (!in->version || !out->version)
       return MESA_GLINTEROP_INVALID_VALUE;
 
    /* Validate the target. */