snprintf-chk.c (ptr): Declare volatile.

	* snprintf-chk.c (ptr): Declare volatile.
	* strcpy-chk.c (s2, s3, l1): Declare volatile.
	* snprintf-chk.c (ptr): Declare volatile.
	* vsprintf-chk.c (ptr): Declare volatile.
	* vsnprintf-chk.c (ptr): Declare volatile.

From-SVN: r167466