Fix uc_mem_protect

qemu/softmmu/memory.c

@@ -1084,6 +1084,7 @@ void memory_region_set_readonly(MemoryRegion *mr, bool readonly)
     if (mr->readonly != readonly) {
         memory_region_transaction_begin();
         mr->readonly = readonly;
+        mr->uc->memory_region_update_pending |= mr->enabled;
         memory_region_transaction_commit(mr);
     }
 }