Fix #5: FlicWriter panics during to postage stamp creation.
Fix #5: FlicWriter panics during to postage stamp creation.

This fixes commit 4709cfc314b25fddf466c5b32271d7083ef0b3cd.

Vec::with_capacity does not allocate any elements, causing a panic due
to index out of range.

wangds/libflic,wangds/libflic