Reduce lint

@@ -187,11 +187,11 @@
          * Handle a size in percent. Anything other than a single percent
          * modifier is invalid. We use either the zone's swap limit or the
          * system's total available swap size as the initial value. Perform the
          * intermediate calculation in pages to avoid overflow.
          */
-        if (*c == '\%') {
+        if (*c == '%') {
                 u_longlong_t cap;
 
                 if (*(c + 1) != '\0')
                         return (EINVAL);