memcached_increment_with_initial() sets wrong initial value

[Szymon]

When calling memcached_increment_with_initial(memcached_st*, length, 1, 1, timeout, &out) (if there is no such key in memcached) you would expect this key to have "1" value. But it has something really weird:

"1\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0"

So the key value is a 22 characters string with a number at the beginning and then padding zeros. You can see it when yo use telnet and ask memcached directly for key value:

get get ADV-CNTR-IMP-not-a-date-time-3--1:-1
VALUE ADV-CNTR-IMP-not-a-date-time-3--1:-1 0 22
1END

Also Python library reports the same value.

From C language perspective this bug is not visible and this is probably why it hasn't been found yet. Any subsequent call to memcached_increment_with_initial sets value to a correct format, for example "2".