All these calls first entered the whole array into the cache and
only then filled it up with values. If that failed, the values
stayed in the cache and could be reused by something else.
Testcase is sc/qa/.../linest.fods, where the error in X19 prevents
caching of that column for the formula in AA24:AA28. Since currently
ScFormulaCell::InterpretFormulaGroup() calls InterpretFormulaGroupOpenCL()
twice, the first ScGroupTokenConverter::convert() call cached
the incomplete column and then failed, and the second call simply reused
the value. But this could presumably happen for multiple formulas using
data in the same column as well, even without the double call.

Change-Id: Iaa55671936fe61f72dfa35940db8deaf27d1c22d
Reviewed-on: https://gerrit.libreoffice.org/57912
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>