Fix bug where compound types were not permitted as return values in defcfn

CHANGELOG.md

@@ -6,6 +6,7 @@ All notable changes to this project will be documented in this file. This change
 - An `address?` predicate
 
 ### Fixed
+- Compound types were not allowed as return types in `defcfn`
 - `nil` was not considered a null pointer
 - Primitive-serializing types fail to compile as arguments to downcall handles
 - Primitive-serializing types fail to load as arguments to upcall functions

src/clj/coffi/ffi.clj

@@ -504,7 +504,7 @@
                    (s/or :string string?
                          :symbol simple-symbol?))
           :native-arglist (s/coll-of ::mem/type :kind vector?)
-          :return-type qualified-keyword?
+          :return-type ::mem/type
           :wrapper (s/?
                     (s/cat
                      :native-fn simple-symbol?