Some of this code was originally added in b7b1200dd3,
which likely meant to initialize the slice with a length to reduce allocations,
however, instead of initializing with a zero-length and a capacity, it
initialized the slice with a fixed length, which was corrected in commit
0c63c42f81.
This patch initializes the slice with a zero-length and expected capacity.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>