fixed contentbuffer delete issue
fixed contentbuffer delete issue

(If the first object was deleted, the second was deleted, too,
because it's buffer was not corrected, as the buffer correction
started at 1 while the second one got place 0 when the first one
was deleted.)

Signed-off-by: Lennard Wasserthal <682e03da6185febc6b3ed5fc50982932fd247b4b@nefkom.net>

Wasserthal/lhendraw,Wasserthal/lhendraw,Wasserthal/lhendraw