SEQUENCEEXT

Message        <Context> allowing a comma operator is a language
               extension.

Description    In this context the C standard does not allow the
               comma (sequence) operator.  HP C allows this syntax
               for compatibility with some other C compilers.  Be
               aware that this syntax may not be accepted by other C
               compilers.

User Action    If the intent is to use an expression that is not
               necessarily a constant expression, then enclose it in
               parentheses.  But if the intent of the declaration is
               to use a constant expression, then the comma operator
               cannot be used.