[librsvg] Fix crash in rsvg_filter_primitive_component_transfer_render.

[Hiroyuki Ikezoe <hiikezoe src gnome org>]

commit 829eea4894ea816e48155d965ed8ea17d5c923bb
Author: Tom Paker <palfrey tevp net>
Date:   Mon Apr 12 12:40:42 2010 +0900

    Fix crash in rsvg_filter_primitive_component_transfer_render.
    
    Fix for bug #579286.
    Set correct fallback transfer funcion.
    Some ComponentTransferFunc are not set if the original RGBA
    order is used for index because channelmap order is BGRA on x86.

 rsvg-filter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/rsvg-filter.c b/rsvg-filter.c
index 0f8b853..0f82caa 100644
--- a/rsvg-filter.c
+++ b/rsvg-filter.c
@@ -2060,7 +2060,7 @@ rsvg_filter_primitive_component_transfer_render (RsvgFilterPrimitive *
                 }
         }
         if (i == self->super.children->len)
-            functions[c] = identity_component_transfer_func;
+            functions[ctx->channelmap[c]] = identity_component_transfer_func;
 
     }