Fixed a bug where isnumeric returned true for MappedTensors of class 'char'

Author: DylanMuir

MappedTensor.m

@@ -711,7 +711,7 @@ function delete(mtVar)
 
       % isnumeric - METHOD Overloaded isnumeric function
       function [bIsNumeric] = isnumeric(mtVar)
-         bIsNumeric = ~islogical(mtVar);
+         bIsNumeric = ~islogical(mtVar) && ~ischar(mtVar);
       end
 
       % isscalar - METHOD Overloaded isscalar function