Fix FFI callback test and add missing run-tests to dlopen test

Message

The callback test expected double-typed callbacks to error, but the dyncall handler fully supports float/double args and returns. Replace with a test verifying double callbacks create successfully.

Add missing (run-tests) call to test-ffi-dlopen.sgl so the CI smoke test actually reports results.

Changed

 test/test-ffi-dlopen.sgl | 2 ++
 test/test-ffi.sgl        | 9 +++++----
 2 files changed, 7 insertions(+), 4 deletions(-)

Diff

test/test-ffi-dlopen.sglmodified

@@ -158,3 +158,5 @@

158

;; Clean up the shared library

159

(when (file-exists? test-lib-so)

160

(delete-file test-lib-so))

+161

+162

(run-tests)

test/test-ffi.sglmodified

@@ -372,7 +372,8 @@

372

(assert-true (pointer? cb))

373

(c-callback-release cb)))

374

−375

(test "unsupported signature raises error"

−376

(assert-error

−377

(c-callback (list ffi/double ffi/double) ffi/double

−378

(lambda (a b) (+ a b))))))

+375

(test "double callback creates successfully"

+376

(let ((cb (c-callback (list ffi/double ffi/double) ffi/double

+377

(lambda (a b) (+ a b)))))

+378

(assert-true (pointer? cb))

+379

(c-callback-release cb))))