* include/gc.h (GC_base): Fix a typo in the comment.
/* Return a pointer to the base (lowest address) of an object given */
/* a pointer to a location within the object. */
-/* I.e. map an interior pointer to the corresponding bas pointer. */
+/* I.e., map an interior pointer to the corresponding base pointer. */
/* Note that with debugging allocation, this returns a pointer to the */
/* actual base of the object, i.e. the debug information, not to */
/* the base of the user object. */