FindBug warning: EQ_SELF_USE_OBJECT: class defines equals(Region) and uses Object.equals(Object)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1716004 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/ss/util/Region.java

@@ -159,12 +159,19 @@ public class Region implements Comparable<Region> {
 		return false;
 	}
 
+	@Override
+	public boolean equals(Object o) {
+		if (this instanceof Region)
+			return equals((Region) o);
+		else
+			return false;
+	}
+
 	public boolean equals(Region r)
 	{
 		return (compareTo(r) == 0);
 	}
 
-
 	@Override
 	public int hashCode() {
 	    assert false : "hashCode not designed";