Consistent style for usage of sizeof operator

The code is splattered with a mix of

  sizeof foo
  sizeof (foo)
  sizeof(foo)

Standardize on sizeof(foo) and add a syntax check rule to
enforce it

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

daemon/libvirtd.c

@@ -1441,7 +1441,7 @@ int main(int argc, char **argv) {
 
         if ((statuswrite = daemonForkIntoBackground(argv[0])) < 0) {
             VIR_ERROR(_("Failed to fork as daemon: %s"),
-                      virStrerror(errno, ebuf, sizeof ebuf));
+                      virStrerror(errno, ebuf, sizeof(ebuf)));
             goto cleanup;
         }
     }