[PATCH] Don't do unnecessary work: clrhash on empty hash

The attached patch doesn't do much for the build-time of ABCL (not as
much as the 10% when the equivalent patch went into SBCL), but it's
still nice not to do too much work.

Bye,

Erik.

Index: HashTable.java
===================================================================
RCS file: /cvsroot/armedbear-j/j/j/src/org/armedbear/lisp/HashTable.java,v
retrieving revision 1.57
diff -u -r1.57 HashTable.java
--- HashTable.java	6 Mar 2007 11:40:49 -0000	1.57
+++ HashTable.java	4 Aug 2008 19:20:09 -0000
@@ -150,6 +150,8 @@

   public synchronized void clear()
   {
+    if (count == 0) return;
+
     for (int i = buckets.length; i-- > 0;)
       buckets[i] = null;
     count = 0;

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