PVS-Studio warning V564 for NSS

PRBool SEC_ASN1IsTemplateSimple(
  const SEC_ASN1Template *theTemplate)
{
  ...
  if (!theTemplate->kind & SEC_ASN1_CHOICE) {
    return PR_FALSE; /* no choice means not simple */
  }
  ...
}

This is what should have been written here: if (!(theTemplate->kind & SEC_ASN1_CHOICE)) {

This suspicious code was found in NSS project by PVS-Studio static code analyzer.
Warning message is:
V564 The '&' operator is applied to bool type value. You've probably forgotten to include parentheses or intended to use the '&&' operator. nss secasn1u.c 121

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