egl: return the correct offscreen front buffer when asked for it
egl: return the correct offscreen front buffer when asked for it

Signed-off-by: Simon Busch <e923d8431f09840b119134ca71ec8d74989d15cc@gravedo.de>

morphis/libhybris,morphis/libhybris,morphis/libhybris,stskeeps/libhybris,stskeeps/libhybris,stskeeps/libhybris