coccinelle: Remove unnecessary variables for function return value

Use Coccinelle script to replace 'ret = E; return ret' with
'return E'. The script will do the substitution only when the
function return type and variable type are the same.

Manual fixups:

* audio/audio.c: coding style of "read (...)" and "write (...)"
* block/qcow2-cluster.c: wrap line to make it shorter
* block/qcow2-refcount.c: change indentation of wrapped line
* target-tricore/op_helper.c: fix coding style of
  "remainder|quotient"
* target-mips/dsp_helper.c: reverted changes because I don't
  want to argue about checkpatch.pl
* ui/qemu-pixman.c: fix line indentation
* block/rbd.c: restore blank line between declarations and
  statements

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1465855078-19435-4-git-send-email-ehabkost@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Unused Coccinelle rule name dropped along with a redundant comment;
whitespace touched up in block/qcow2-cluster.c; stale commit message
paragraph deleted]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/tests/virtio-net-test.c b/tests/virtio-net-test.c
index e5c144818e..f4f6a4ae7a 100644
--- a/tests/virtio-net-test.c
+++ b/tests/virtio-net-test.c
@@ -248,8 +248,6 @@ static void hotplug(void)
 
 int main(int argc, char **argv)
 {
-    int ret;
-
     g_test_init(&argc, &argv, NULL);
 #ifndef _WIN32
     qtest_add_data_func("/virtio/net/pci/basic", send_recv_test, pci_basic);
@@ -258,7 +256,5 @@ int main(int argc, char **argv)
 #endif
     qtest_add_func("/virtio/net/pci/hotplug", hotplug);
 
-    ret = g_test_run();
-
-    return ret;
+    return g_test_run();
 }