[libgepub] lib: Fix discarding const qualifier

[Daniel Garcia Moreno <danigm src gnome org>]

commit 67e3b7943c3c46cbed6c48434b9b7b8a3d69a950
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Jun 21 18:17:51 2017 +0200

    lib: Fix discarding const qualifier
    
    passing argument 2 of ‘gepub_utils_has_parent_tag’ discards ‘const’ qualifier from pointer target type
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784050

 libgepub/gepub-utils.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgepub/gepub-utils.c b/libgepub/gepub-utils.c
index a409f51..1484b6b 100644
--- a/libgepub/gepub-utils.c
+++ b/libgepub/gepub-utils.c
@@ -68,7 +68,7 @@ set_epub_uri (xmlNode *node, const gchar *path, const gchar *tagname, const gcha
 }
 
 static gboolean
-gepub_utils_has_parent_tag (xmlNode *node, gchar *name, ...)
+gepub_utils_has_parent_tag (xmlNode *node, const char *name, ...)
 {
     va_list ap;