Fix type-mismatch, index-out-of-bounds and boxed-equality CodeQL alerts (#782)

Valery Kharseko

17 hours ago 65111c6f7556527decee160246183cf1b865587e

 opendj-server-legacy/src/main/java/org/opends/server/extensions/BCrypt.java

@@ -437,7 +437,7 @@
   * @return  the decoded value of x
   */
  private static byte char64(char x) {
    if (x < 0 || x > index_64.length) {
    if (x >= index_64.length) {
      return -1;
    }
    return index_64[x];