tdf#120491 EPUB export: fix IngramSpark validator error

Change-Id: I7b6d2217525dbf2e8c9c78a14ea7601c4170857a
Reviewed-on: https://gerrit.libreoffice.org/62267
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins
diff --git a/external/libepubgen/UnpackedTarball_libepubgen.mk b/external/libepubgen/UnpackedTarball_libepubgen.mk
index 14efadb..7553e82 100644
--- a/external/libepubgen/UnpackedTarball_libepubgen.mk
+++ b/external/libepubgen/UnpackedTarball_libepubgen.mk
@@ -8,6 +8,7 @@
#

epubgen_patches :=
epubgen_patches += tdf-120491.patch

ifeq ($(COM_IS_CLANG),TRUE)
ifneq ($(filter -fsanitize=%,$(CC)),)
diff --git a/external/libepubgen/tdf-120491.patch b/external/libepubgen/tdf-120491.patch
new file mode 100644
index 0000000..2a02a66
--- /dev/null
+++ b/external/libepubgen/tdf-120491.patch
@@ -0,0 +1,33 @@
From 92760e4b0b8da126029c5ff858ebec27df4acfa8 Mon Sep 17 00:00:00 2001
Subject: [PATCH] tdf#120491 EPUBHTMLGenerator: remove not needed <meta
 content="text/html...">

IngramSpark flags this as an error, and not writing it still passes
epubcheck.
---
 src/lib/EPUBHTMLGenerator.cpp | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/lib/EPUBHTMLGenerator.cpp b/src/lib/EPUBHTMLGenerator.cpp
index a950ea5..f6c2527 100644
--- src/lib/EPUBHTMLGenerator.cpp
+++ src/lib/EPUBHTMLGenerator.cpp
@@ -579,14 +579,9 @@ void EPUBHTMLGenerator::endDocument()
     m_impl->m_document.openElement("title", RVNGPropertyList());
     m_impl->m_document.closeElement("title");
   }
-  RVNGPropertyList metaAttrs;
-  metaAttrs.insert("http-equiv", "content-type");
-  metaAttrs.insert("content", "text/html; charset=UTF-8");
-  m_impl->m_document.openElement("meta", metaAttrs);
-  m_impl->m_document.closeElement("meta");
   if (m_impl->m_version >= 30 && m_impl->m_layoutMethod == EPUB_LAYOUT_METHOD_FIXED)
   {
-    metaAttrs.clear();
+    RVNGPropertyList metaAttrs;
     metaAttrs.insert("name", "viewport");
     std::stringstream content;
     if (const librevenge::RVNGProperty *pageWidth = m_impl->m_actualPageProperties["fo:page-width"])
-- 
2.16.4