message: Fix also set unsigned correctly when opening a persistent system in shell
diff: @@ -20627,6 +20627,8 @@ int SQLITE_CDECL wmain(int argc, wchar_t **wargv){
  data.openMode = SHELL_OPEN_READONLY;
  }else if( strcmp(z,"-nofollow")==0 ){
  data.openFlags = SQLITE_OPEN_NOFOLLOW;
  + }else if( strcmp(z,"-unsigned")==0 ){
  + data.openFlags |= DUCKDB_UNSIGNED_EXTENSIONS;
  #if !defined(SQLITE_OMIT_VIRTUALTABLE) && defined(SQLITE_HAVE_ZLIB)
  }else if( strncmp(z, "-A",2)==0 ){
  /* All remaining command-line arguments are passed to the ".archive"
  