gcc 6.3.0 produces a warning that may be a potential bug

[ColinIanKing]

src/parse_config.c: In function 'populate_default_config':
src/parse_config.c:174:18: warning: '__s' may be used uninitialized in this function [-Wmaybe-uninitialized]
pos = token + strlen(subtoken) + 1;
^~~~~~~~~~~~~~~~
src/parse_config.c:151:12: note: '__s' was declared here
static int cpuset_to_bitmap(char *buf, cpu_set_t *cpumask)
^~~~~~~~~~~~~~~~