cnt() on empty array should return 0

[numere-bot]

DESCRIPTION

Describe, what you observe or want to be changed: If the function cnt() is applied to an empty array (e.g. as cnt({})) it should return 0 instead of 1.

Describe, what you expect to happen:

cnt({}) == 0
cnt(void) == 0
cnt(c{}) == 0 ## if c{} is empty
cnt(t(:,1)) == 0 ## if column 1 of d() is empty

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