nouveau: nv30: Check for NULL front (happens with DRI2)

diff --git a/src/gallium/drivers/nv30/nv30_screen.c b/src/gallium/drivers/nv30/nv30_screen.c
index 221ae1b5f88eef502cc75d0dbe03c2393610a250..7cd36902eb489f04bf4a76de03cae8b29768c273 100644 (file)
--- a/src/gallium/drivers/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nv30/nv30_screen.c
@@ -116,7 +116,10 @@ nv30_screen_surface_format_supported(struct pipe_screen *pscreen,
                case PIPE_FORMAT_Z24X8_UNORM:
                        return TRUE;
                case PIPE_FORMAT_Z16_UNORM:
-                       return (front->format == PIPE_FORMAT_R5G6B5_UNORM);
+                       if (front) {
+                               return (front->format == PIPE_FORMAT_R5G6B5_UNORM);
+                       }
+                       return TRUE;
                default:
                        break;
                }