fix: FUNCTION ABS

Author: yutaro-sakamoto

libcobj/src/jp/osscons/opensourcecobol/libcobj/common/CobolIntrinsic.java

@@ -733,7 +733,7 @@ public static AbstractCobolField funcExp10(AbstractCobolField srcfield) {
   /** libcob/intrinsicのcob_intr_absの実装 */
   public static AbstractCobolField funcAbs(AbstractCobolField srcfield) {
     makeFieldEntry(srcfield);
-    CobolDecimal d1 = new CobolDecimal();
+    CobolDecimal d1 = srcfield.getDecimal();
     d1.setValue(d1.getValue().abs());
     try {
       d1.getField(currField, 0);

tests/run.src/functions.at

@@ -20,7 +20,6 @@
 ### ISO+IEC+1989-2002 15 Intrinsic Functions
 
 AT_SETUP([FUNCTION ABS])
-AT_CHECK([${SKIP_TEST}])
 
 AT_DATA([prog.cob], [
        IDENTIFICATION   DIVISION.