cpdup bugfix

[Oliver Fromme]

I noticed that cpdup sometimes doesn't remove files on the
target that were removed on the source.  This is caused by
a failure to reset the "node" variable to NULL in cpdup.c.

This bug was accidentally introduced in cpdup v1.16 by me
when I wrote the ScanDir() and IterateList() functions.
I'm very sorry for that.

Please apply the patch below.  It fixes the problem.

Best regards
   Oliver

--- cpdup/cpdup.c.orig	2009-12-03 21:55:22.000000000 +0100
+++ cpdup/cpdup.c	2010-03-25 12:24:55.000000000 +0100
@@ -975,12 +975,13 @@
 
 	if (!skipdir) {
 	    List *list = malloc(sizeof(List));
-	    Node *node = NULL;
+	    Node *node;
 	    char *name;
 
 	    if (DirShowOpt)
 		logstd("Scanning %s ...\n", spath);
 	    InitList(list);
+	    node = NULL;
 	    if (ScanDir(list, &SrcHost, spath, &CountSourceReadBytes, 0) == 0) {
 		while ((name = IterateList(list, &node, 0)) != NULL) {
 		    char *nspath;
@@ -1011,6 +1012,7 @@
 		 */
 		if (dpath && ScanDir(list, &DstHost, dpath,
 			&CountTargetReadBytes, 3) == 0) {
+		    node = NULL;
 		    while ((name = IterateList(list, &node, 3)) != NULL) {
 			/*
 			 * If object does not exist in source or .cpignore