extern opts_cmd_t opts;
-#define OPTS_GENERIC(f,i) (!! (((f)[(i)/32]) & (1<< (unsigned)((i)%32))))
+#define OPTS_GENERIC(f,i) (!! (((f)[(i)/32]) & (1U << (unsigned)((i)%32))))
#define OPTS_FLAG(i) OPTS_GENERIC(opts.flags, (i))
#define OPTS_WARN(i) OPTS_GENERIC(opts.warn, (i))