river: support wp-single-pixel-buffer-v1

 deps/zig-wlroots | 2 +-
 river/Server.zig | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/deps/zig-wlroots b/deps/zig-wlroots
index 6c5a550..8e6f5c4 160000
--- a/deps/zig-wlroots
+++ b/deps/zig-wlroots
@@ -1 +1 @@
-Subproject commit 6c5a55081ead808496e76d535b9de4e8cdef00c3
+Subproject commit 8e6f5c4d65830d5f01ee0f7c8314ebd12b3da570
diff --git a/river/Server.zig b/river/Server.zig
index c3ce236..8cd3614 100644
--- a/river/Server.zig
+++ b/river/Server.zig
@@ -137,6 +137,7 @@ pub fn init(self: *Self) !void {
     _ = try wlr.ExportDmabufManagerV1.create(self.wl_server);
     _ = try wlr.GammaControlManagerV1.create(self.wl_server);
     _ = try wlr.ScreencopyManagerV1.create(self.wl_server);
+    _ = try wlr.SinglePixelBufferManagerV1.create(self.wl_server);
     _ = try wlr.Viewporter.create(self.wl_server);
 }