nv50: fix crash in nv50_program_destroy

diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c
index 147a98a..8414d06 100644 (file)
--- a/src/gallium/drivers/nv50/nv50_program.c
+++ b/src/gallium/drivers/nv50/nv50_program.c
@@ -1718,7 +1718,7 @@ nv50_fragprog_validate(struct nv50_context *nv50)
 void
 nv50_program_destroy(struct nv50_context *nv50, struct nv50_program *p)
 {
-       struct pipe_winsys *ws = nv50->pipe.winsys;
+       struct pipe_screen *pscreen = nv50->pipe.screen;
 
        while (p->exec_head) {
                struct nv50_program_exec *e = p->exec_head;
@@ -1730,7 +1730,7 @@ nv50_program_destroy(struct nv50_context *nv50, struct nv50_program *p)
        p->exec_size = 0;
 
        if (p->buffer)
-               pipe_buffer_reference(ws, &p->buffer, NULL);
+               pipe_buffer_reference(pscreen, &p->buffer, NULL);
 
        nv50->screen->nvws->res_free(&p->data);