mesa: fix conditional in save_Lightfv(), bug 18838

(cherry picked from commit 1e2f57425153d73646fde7c91c16aa5559491556)

diff --git a/src/mesa/main/dlist.c b/src/mesa/main/dlist.c
index ffe6dbf..44341c5 100644 (file)
--- a/src/mesa/main/dlist.c
+++ b/src/mesa/main/dlist.c
@@ -2002,7 +2002,7 @@ save_Lightfv(GLenum light, GLenum pname, const GLfloat *params)
    Node *n;
    ASSERT_OUTSIDE_SAVE_BEGIN_END_AND_FLUSH(ctx);
    n = ALLOC_INSTRUCTION(ctx, OPCODE_LIGHT, 6);
-   if (OPCODE_LIGHT) {
+   if (n) {
       GLint i, nParams;
       n[1].e = light;
       n[2].e = pname;