Add support for RGBA frame types.

[nageru] / bmusb

diff --git a/bmusb b/bmusb
index 0853ce1f4e8632d1190569d53c1f5825d2812eb1..824260a0732a49b5a18f2e16e04b0373c37a3bea 160000 (submodule)
--- a/bmusb
+++ b/bmusb
@@ -1 +1 @@
-Subproject commit 0853ce1f4e8632d1190569d53c1f5825d2812eb1
+Subproject commit 824260a0732a49b5a18f2e16e04b0373c37a3bea