Fix a typo in gc.c.
MODIFY
src/gc.c
src/gc.c
@@ -433,7 +433,7 @@ mrb_gc_protect(mrb_state *mrb, mrb_value obj)
Register your object when it's exported to C world,
without reference from Ruby world, e.g. callback
- arguments. Don't forget to remove the obejct using
+ arguments. Don't forget to remove the object using
mrb_gc_unregister, otherwise your object will leak.
*/

Fix a typo in gc.c.