In LibreOffice Calc formula "=" work not as expected with empty cells. When I try to copy value from empty (blank) cell via simple formula "=A1", it show zero number in cell instead of zero cell.

How to reproduce:
fill 3 cells in A1-A3 range with values:
0
[leave cell empty]
1

And in 3 cells of B column fill simple formulas "=A1", "=A2" and "=A3".

After this you will see in B2 cell "0" value instead of empty cell, here is screenshot: http://i.imgur.com/FFpo4Dv.png

Based on the logic, value of B2 cell must be "", so blank empty cell. Why LibreOffice Calc show zero? And how I can got expected result?

I have found workaround via =IF(A2="";"";A2)
but this looks like ugly hack instead of good solution.

I know about option Tools-->Options-->Openoffice Calc-->View. Uncheck "Display Zero Values". But this option will hide all zeros in all cells, this is wrong. I need to hide only zeros from copied empty cells, and leave zeros on cells filled via zero manually.

If this is not a bug, but new feature - can you provide and describe in Documentation simple way how to easily solve descibed problem with copying empty cell values to another cell as empty result instead of 0?

Thanks.