align the structure of hasheq/dohasheq with equiv/pcequiv to avoid deoptimization of hash by hotspot

Signed-off-by: Rich Hickey <richhickey@gmail.com>

Author: cgrand

src/jvm/clojure/lang/Util.java

@@ -122,10 +122,14 @@ static public int hasheq(Object o){
 	if(o instanceof Number)
 		return Numbers.hasheq((Number)o);
 	else if(o instanceof IHashEq)
-		return ((IHashEq)o).hasheq();
+		return dohasheq(o);
 	return o.hashCode();
 }
 
+public static int dohasheq(Object o) {
+	return ((IHashEq)o).hasheq();
+}
+
 static public int hashCombine(int seed, int hash){
 	//a la boost
 	seed ^= hash + 0x9e3779b9 + (seed << 6) + (seed >> 2);