Silence expression result unused warnings with clang.
The PyObject_INIT() macros returns obj:

../cpython/Objects/methodobject.c:32:23: warning: expression result unused [-Wunused-value]
        PyObject_INIT(op, &PyCFunction_Type);
                      ^~
../cpython/Include/objimpl.h:139:69: note: expanded from macro 'PyObject_INIT'
    ( Py_TYPE(op) = (typeobj), _Py_NewReference((PyObject *)(op)), (op) )
                                                                    ^
1 warning generated.
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 29c3b32..05b7679 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -119,7 +119,7 @@
             return PyErr_NoMemory();
     }
     /* Inline PyObject_New */
-    PyObject_INIT(op, &PyFloat_Type);
+    (void)PyObject_INIT(op, &PyFloat_Type);
     op->ob_fval = fval;
     return (PyObject *) op;
 }