nv50: fix GP state bind and validate

src/gallium/drivers/nv50/nv50_shader_state.c

@@ -362,6 +362,10 @@ nv50_geomprog_validate(struct nv50_context *nv50)
    struct nv50_program *p = nv50->geomprog;
    struct nouveau_stateobj *so = NULL;
 
+   /* GP may be NULL, but VP and FP may not */
+   if (!p)
+      return NULL; /* GP is deactivated in linkage validation */
+
    if (!p->translated) {
       if (nv50_program_validate(p))
          nv50_gp_update_stateobj(nv50, p);

src/gallium/drivers/nv50/nv50_state.c

@@ -663,7 +663,7 @@ nv50_gp_state_bind(struct pipe_context *pipe, void *hwcso)
 {
 	struct nv50_context *nv50 = nv50_context(pipe);
 
-	nv50->fragprog = hwcso;
+	nv50->geomprog = hwcso;
 	nv50->dirty |= NV50_NEW_GEOMPROG;
 }