fixup! Removed `to_ary` conversion method.

include/mruby/array.h

@@ -199,7 +199,7 @@ MRB_API void mrb_ary_set(mrb_state *mrb, mrb_value ary, mrb_int n, mrb_value val
  * @param other The array to replace it with.
  */
 MRB_API void mrb_ary_replace(mrb_state *mrb, mrb_value self, mrb_value other);
-MRB_API mrb_value mrb_array_type(mrb_state *mrb, mrb_value self);
+MRB_API mrb_value mrb_ensure_array_type(mrb_state *mrb, mrb_value self);
 MRB_API mrb_value mrb_check_array_type(mrb_state *mrb, mrb_value self);
 
 /*

src/array.c

@@ -1072,7 +1072,7 @@ mrb_ary_splat(mrb_state *mrb, mrb_value v)
   if (mrb_nil_p(a)) {
     return mrb_ary_new_from_values(mrb, 1, &v);
   }
-  mrb_array_type(mrb, a);
+  mrb_ensure_array_type(mrb, a);
   return a;
 }
 

src/object.c

@@ -607,7 +607,7 @@ mrb_check_string_type(mrb_state *mrb, mrb_value str)
 }
 
 MRB_API mrb_value
-mrb_array_type(mrb_state *mrb, mrb_value ary)
+mrb_ensure_array_type(mrb_state *mrb, mrb_value ary)
 {
   if (!mrb_array_p(ary)) {
     mrb_raisef(mrb, E_TYPE_ERROR, "%S cannot be converted to Array",