i915: fix carsh in i830_emit_state. (bug #17766)

diff --git a/src/mesa/drivers/dri/i915/i830_vtbl.c b/src/mesa/drivers/dri/i915/i830_vtbl.c
index 773a8b4dd0136a9b07e3a570d29ee7208b1f639e..3c9851e63fcbc8aca4dcee08721b80a7fcc45d2f 100644 (file)
--- a/src/mesa/drivers/dri/i915/i830_vtbl.c
+++ b/src/mesa/drivers/dri/i915/i830_vtbl.c
@@ -449,7 +449,8 @@ i830_emit_state(struct intel_context *intel)
    aper_array[aper_count++] = intel->batch->buf;
    if (dirty & I830_UPLOAD_BUFFERS) {
       aper_array[aper_count++] = state->draw_region->buffer;
-      aper_array[aper_count++] = state->depth_region->buffer;
+      if (state->depth_region)
+         aper_array[aper_count++] = state->depth_region->buffer;
    }
 
    for (i = 0; i < I830_TEX_UNITS; i++)