Bugfix: Prevent deadlock in opendir_func

When returning neither None or an int from opendir, fuse-python does not release
the GIL and as a result, the application deadlocks.

This is a simple fix, solving the issue by removing the premature return and
instead using the OUT path already present in the EPILOGUE macro.

Author: moshevds

fuseparts/_fusemodule.c

@@ -281,7 +281,8 @@ opendir_func(const char *path, struct fuse_file_info *fi)
 
 	fi->fh = (uintptr_t) v;
 
-	return 0;
+	ret = 0;
+	goto OUT;
 
 	EPILOGUE
 }