Add 1x1 transparent png to replace missing marble data

Marble currently tries to open non-existent files, and the way
it does that causes an annoying warning on the console. The new
Subsurface version of Marble will instead open this invisible
PNG file whenever it can't find the bitmap it is looking for.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 0 insertions, 0 deletions

diff --git a/marbledata/bitmaps/empty.png b/marbledata/bitmaps/empty.png
new file mode 100644
index 000000000..1914264c0
--- /dev/null
+++ b/marbledata/bitmaps/empty.png