Remember to initialize return value in fixup_options()

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/init.c b/init.c
index 15adf38..4ce57a4 100644
--- a/init.c
+++ b/init.c
@@ -248,7 +248,7 @@
 static int fixup_options(struct thread_data *td)
 {
 	struct thread_options *o = &td->o;
-	int ret;
+	int ret = 0;
 
 #ifndef FIO_HAVE_PSHARED_MUTEX
 	if (!o->use_thread) {