[eclipse] Fixin gthe splash screen format.
[eclipse] Fixin gthe splash screen format.

The splash screen bitmap had a format that cannot be used on Windows
platform.

see #238

Signed-off-by: Stéphane Galland <23860b554af9116d4237121086bd6767cdd4ff4b@arakhne.org>

jgfoster/sarl,sarl/sarl,gallandarakhneorg/sarl,sarl/sarl,sarl/sarl,jgfoster/sarl,gallandarakhneorg/sarl,jgfoster/sarl,jgfoster/sarl,gallandarakhneorg/sarl,sarl/sarl,sarl/sarl,sarl/sarl