(no commit message)

[imagemagick] / MagickCore / list.c

diff --git a/MagickCore/list.c b/MagickCore/list.c
index 35ae50d7d5989ca2291e9f1ce2f16274b241c42f..1cd6d5c87ea38f5fe39234a7facc19520d72a742 100644 (file)
--- a/MagickCore/list.c
+++ b/MagickCore/list.c
@@ -599,10 +599,9 @@ MagickExport Image *GetImageFromList(const Image *images,const ssize_t index)
 
   /*
     Designed to efficiently find first image (index == 0), or last image
-    (index == -1) as appropriate, without to go through the whole image list,
-    unless the offset is outside of the list length range.
-
-    That is it tries to avoid 'counting the whole list' to handle the index.
+    (index == -1) as appropriate, without to go through the whole image list.
+    That is it tries to avoid 'counting the whole list' to  handle the
+    most common image indexes.
   */
   if ( index < 0 )
     {
@@ -944,9 +943,14 @@ MagickExport Image *NewImageList(void)
 %    o image: the image.
 %
 */
-MagickExport void PrependImageToList(Image **images,Image *image)
+MagickExport void PrependImageToList(Image **images,Image *prepend)
 {
-  AppendImageToList(&image,*images);
+  if (*images == (Image *) NULL)
+    {
+      *images=prepend;
+      return;
+    }
+  AppendImageToList(&prepend,*images);
 }
 \f
 /*