alexgann 4748b88d9c Fix to cellExists for non-existent namedRanges
Found an issue where cellExists was failing on a non-existent namedRange
as it was flowing down to the coordinateFromString (1217) call.  Proposed
change trusts the REGEXP check and if $namedRange == NULL after all
then simply return false (ie the cell does not exist).
2012-10-19 13:38:26 -03:00
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