wcap: Support the other pixel format we may write
diff --git a/wcap/wcap-decode.h b/wcap/wcap-decode.h
index 598e490..8cf45d3 100644
--- a/wcap/wcap-decode.h
+++ b/wcap/wcap-decode.h
@@ -50,6 +50,7 @@
 	size_t size;
 	void *map, *p, *end;
 	uint32_t *frame;
+	uint32_t format;
 	int width, height;
 };