[Nouveau] [PATCH] nv50: fix crash in NV50SyncToVBlank

[Marcin Slusarz]

Regression from "WIP: port to new libdrm".
---
 src/nv50_accel.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/nv50_accel.c b/src/nv50_accel.c
index 66d6cb8..7c640f2 100644
--- a/src/nv50_accel.c
+++ b/src/nv50_accel.c
@@ -44,6 +44,9 @@ NV50SyncToVBlank(PixmapPtr ppix, BoxPtr box)
 	if (!crtcs)
 		return;
 
+	if (!PUSH_SPACE(push, 10))
+		return;
+
 	BEGIN_NV04(push, SUBC_NVSW(0x0060), 2);
 	PUSH_DATA (push, pNv->vblank_sem->handle);
 	PUSH_DATA (push, 0);
-- 
1.7.8.5