Whitespace cleanup: Fix broken indentation by hand

This patch fixes wrong indentation introduced by the last patch.

This was mostly done with vim-s retab feature.

src/modules/xen/module-xenpv-sink.c

@@ -796,7 +796,7 @@ static int wait_for_backend_state_change() {
             free(buf);
             free(vec);
         }
-        /* else: timeout */
+    /* else: timeout */
     } while (backend_state == STATE_UNDEFINED && \
             (now = time(NULL)) < start + seconds);