qapi: Replace qobject_to_X(o) by qobject_to(X, o)

This patch was generated using the following Coccinelle script:

@@
expression Obj;
@@
(
- qobject_to_qnum(Obj)
+ qobject_to(QNum, Obj)
|
- qobject_to_qstring(Obj)
+ qobject_to(QString, Obj)
|
- qobject_to_qdict(Obj)
+ qobject_to(QDict, Obj)
|
- qobject_to_qlist(Obj)
+ qobject_to(QList, Obj)
|
- qobject_to_qbool(Obj)
+ qobject_to(QBool, Obj)
)

and a bit of manual fix-up for overly long lines and three places in
tests/check-qjson.c that Coccinelle did not find.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20180224154033.29559-4-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: swap order from qobject_to(o, X), rebase to master, also a fix
to latent false-positive compiler complaint about hw/i386/acpi-build.c]
Signed-off-by: Eric Blake <eblake@redhat.com>

block/rbd.c

@@ -263,14 +263,14 @@ static int qemu_rbd_set_keypairs(rados_t cluster, const char *keypairs_json,
     if (!keypairs_json) {
         return ret;
     }
-    keypairs = qobject_to_qlist(qobject_from_json(keypairs_json,
-                                                  &error_abort));
+    keypairs = qobject_to(QList,
+                          qobject_from_json(keypairs_json, &error_abort));
     remaining = qlist_size(keypairs) / 2;
     assert(remaining);
 
     while (remaining--) {
-        name = qobject_to_qstring(qlist_pop(keypairs));
-        value = qobject_to_qstring(qlist_pop(keypairs));
+        name = qobject_to(QString, qlist_pop(keypairs));
+        value = qobject_to(QString, qlist_pop(keypairs));
         assert(name && value);
         key = qstring_get_str(name);