pan/midgard: Bounds check lcra_restrict_range

We may call it with sentinel values (~0 in particular) corresponding to
unused arguments; ignore these.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>

src/panfrost/midgard/lcra.c

@@ -101,7 +101,7 @@ lcra_set_disjoint_class(struct lcra_state *l, unsigned c1, unsigned c2)
 void
 lcra_restrict_range(struct lcra_state *l, unsigned node, unsigned len)
 {
-        if (l->alignment[node])
+        if (node < l->node_count && l->alignment[node])
                 l->modulus[node] = DIV_ROUND_UP(l->bound - len + 1, 1 << (l->alignment[node] - 1));
 }