* java/math/BigInteger.java(signum): Handle zero properly.

From-SVN: r32441

libjava/ChangeLog

+2000-03-08  Warren Levy  <warrenl@cygnus.com>
+
+	* java/math/BigInteger.java(signum): Handle zero properly.
+
 2000-03-07  Tom Tromey  <tromey@cygnus.com>
 
 	* All files: Updated copyright information.

libjava/java/math/BigInteger.java

@@ -285,7 +285,9 @@ public class BigInteger extends Number implements Comparable
   public int signum()
   {
     int top = words == null ? ival : words[ival-1];
-    return top > 0 ? 1 : top < 0 ? -1 : 0;
+    if (top == 0 && words == null)
+      return 0;
+    return top < 0 ? -1 : 1;
   }
 
   private static int compareTo(BigInteger x, BigInteger y)