[librsvg] Don't coalesce character nodes with tspan nodes

[Christian Persch <chpe src gnome org>]

commit 232e104fd829d9054d55d88b216f5ace589e9925
Author: Martin von Gagern <Martin vGagern gmx net>
Date:   Mon Nov 7 20:14:37 2011 +0100

    Don't coalesce character nodes with tspan nodes
    
    https://bugzilla.gnome.org/show_bug.cgi?id=581108

 rsvg-base.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/rsvg-base.c b/rsvg-base.c
index 499ab75..dbdb65b 100644
--- a/rsvg-base.c
+++ b/rsvg-base.c
@@ -746,6 +746,9 @@ rsvg_characters_impl (RsvgHandle * ctx, const xmlChar * ch, int len)
                 if (RSVG_NODE_TYPE (node) == RSVG_NODE_TYPE_CHARS) {
                     self = (RsvgNodeChars*)node;
                 }
+                else if (RSVG_NODE_TYPE (node) == RSVG_NODE_TYPE_TSPAN) {
+                    self = NULL;
+                }
             }
 
             if (self != NULL) {