annotate: fix warning about uninitialized scalar
annotate: fix warning about uninitialized scalar

Use of uninitialized value in scalar chomp at
./git-annotate.perl line 212, <$kid> chunk 4.

Signed-off-by: Matthias Kestenholz <e388d34fd3c0456122779e95f262c0d70198a168@spinlock.ch>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git