fixes deferred/release blocker issue #3797: Fixed the dbm, marshal, mmap,
ossaudiodev, & winreg modules to return bytes objects instead of bytearray
objects.
diff --git a/Modules/ossaudiodev.c b/Modules/ossaudiodev.c
index 5828c3f..677f9ac 100644
--- a/Modules/ossaudiodev.c
+++ b/Modules/ossaudiodev.c
@@ -366,10 +366,10 @@
 
     if (!PyArg_ParseTuple(args, "i:read", &size))
         return NULL;
-    rv = PyByteArray_FromStringAndSize(NULL, size);
+    rv = PyBytes_FromStringAndSize(NULL, size);
     if (rv == NULL)
         return NULL;
-    cp = PyByteArray_AS_STRING(rv);
+    cp = PyBytes_AS_STRING(rv);
 
     Py_BEGIN_ALLOW_THREADS
     count = read(self->fd, cp, size);
@@ -381,7 +381,7 @@
         return NULL;
     }
     self->icount += count;
-    PyByteArray_Resize(rv, count);
+    _PyBytes_Resize(&rv, count);
     return rv;
 }