checkCIF procedure

PLAT100

 The norm is integer. The CIF-definition for '_cell_formula_units_Z' 
 specifies Z values as 1 -> infinity. SHELXL may report in certain cases a
 real number (E.g. Z = 0.67). In such a case, check whether really more
 decimals are intended and edit accordingly, i.e. 0.67 => 0.66667.