Rule 19.9 - incorrect comment in mc2_1909.c?

[pkruk]

mc2_1909.c contains following code:

Code:

#define SUM(A,B,C) ((A) + (B) + (C)) /* Violates Rule 17.4 */

Rule 17.4 is "Array indexing shall be the only allowed form of pointer arithmetic." - the code does not seem to be violation of this rule.