Add a way to get the current video mode.

[nageru] / bmusb

diff --git a/bmusb b/bmusb
index 487a136592e4bd5acda92d35cf52fe4489c69bbf..5b54cc5acb28f5d2071c99ef7a715044aa30f10c 160000 (submodule)
--- a/bmusb
+++ b/bmusb
@@ -1 +1 @@
-Subproject commit 487a136592e4bd5acda92d35cf52fe4489c69bbf
+Subproject commit 5b54cc5acb28f5d2071c99ef7a715044aa30f10c