符号付き数字と英数字の比較結果が、SIGN SEPARATEの有無で違ってしまう問題の修正です。SIGN SEPARATEの場合も、そうでない場合と同様、符号を除いて比較するようにしました。
Fixed the problem of value comparison between SIGN SEPARATE numeric field and alnum field in IF or EVALUATE statements. SIGN SEPARATE numeric is to be also evaluated excluding its sign in alnum comparison context, as same as it were not SIGN SEPARATE.