ui/console: fix OVERFLOW_BEFORE_WIDEN

Signed-off-by: NGonglei <arei.gonglei@huawei.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

ui/console.c

@@ -1285,9 +1285,9 @@ DisplaySurface *qemu_create_displaysurface_guestmem(int width, int height,
         linesize = width * PIXMAN_FORMAT_BPP(format) / 8;
     }
 
-    size = linesize * height;
+    size = (hwaddr)linesize * height;
     data = cpu_physical_memory_map(addr, &size, 0);
-    if (size != linesize * height) {
+    if (size != (hwaddr)linesize * height) {
         cpu_physical_memory_unmap(data, size, 0, 0);
         return NULL;
     }