From b12d12590a7e91693331e329472e40673648db2b Mon Sep 17 00:00:00 2001
From: Eric House <xwords@eehouse.org>
Date: Thu, 9 Oct 2014 21:21:41 -0700
Subject: [PATCH] don't memcpy 0 bytes

---
 xwords4/common/strutils.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xwords4/common/strutils.c b/xwords4/common/strutils.c
index 6ccd67673..c1485aefd 100644
--- a/xwords4/common/strutils.c
+++ b/xwords4/common/strutils.c
@@ -91,7 +91,9 @@ sortTiles( TrayTileSet* dest, const TrayTileSet* src, XP_U16 skip )
 
     /* Copy in the ones we're not sorting */
     dest->nTiles = skip;
-    XP_MEMCPY( &dest->tiles, &tmp.tiles, skip * sizeof(tmp.tiles[0]) );
+    if ( 0 < skip ) {
+        XP_MEMCPY( &dest->tiles, &tmp.tiles, skip * sizeof(tmp.tiles[0]) );
+    }
 
     while ( skip < tmp.nTiles ) {
         XP_U16 ii, smallest;