From 7a7df3bfe821ab5faafa12094713f215440d555e Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Wed, 20 Apr 2011 12:06:23 +0000
Subject: [PATCH] avoid calling newdataadr() on NULL vertex groups, gives a
 small speedup on loading with files that have many empty groups.

---
 source/blender/blenloader/intern/readfile.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index 1673cbf8458..93d266668e2 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -3412,15 +3412,19 @@ static void lib_link_mesh(FileData *fd, Main *main)
 
 static void direct_link_dverts(FileData *fd, int count, MDeformVert *mdverts)
 {
-	int	i;
+	int i;
 
-	if (!mdverts)
+	if (mdverts == NULL) {
 		return;
+	}
 
-	for (i=0; i<count; i++) {
-		mdverts[i].dw=newdataadr(fd, mdverts[i].dw);
-		if (!mdverts[i].dw)
-			mdverts[i].totweight=0;
+	for (i= count; i > 0; i--, mdverts++) {
+		if(mdverts->dw) {
+			mdverts->dw= newdataadr(fd, mdverts->dw);
+		}
+		if (mdverts->dw == NULL) {
+			mdverts->totweight= 0;
+		}
 	}
 }