Group struct field definitions

IDSTAT-13
TitleAll fields of a struct shall be defined in a single, contiguous block of code.
PriorityStrongly recommended
DescriptionNo fields shall be added to a struct after using it.
RationaleReadability

Avoid:

s = struct("f", 2, "g", 3);

computeCost(s);
s.h = 'new field';

Instead use:

s = struct("f", 2, "g", 3, "h", 'new field');

computeCost(s);