Don't fail if the end of characters is reached after a field fdo#62299

Change-Id: Ib5327fe5a88036f718f90cc0e05f287dc1573d03
(cherry picked from commit aa479a03)
Reviewed-on: https://gerrit.libreoffice.org/2747Reviewed-by: Petr Mladek <pmladek@suse.cz>
Tested-by: Petr Mladek <pmladek@suse.cz>

libvisio/UnpackedTarball_visio.mk

@@ -11,4 +11,10 @@ $(eval $(call gb_UnpackedTarball_UnpackedTarball,visio))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,visio,$(VISIO_TARBALL)))
 
+$(eval $(call gb_UnpackedTarball_set_patchlevel,visio,1))
+
+$(eval $(call gb_UnpackedTarball_add_patches,visio,\
+       libvisio/libvisio-0.0.25.patch \
+))
+
 # vim: set noet sw=4 ts=4:

libvisio/libvisio-0.0.25.patch

+--- a/src/lib/VSDContentCollector.cpp
++++ b/src/lib/VSDContentCollector.cpp
+@@ -2920,10 +2920,8 @@ void libvisio::VSDContentCollector::appendCharacters(WPXString &text, const std:
+     while (true)
+     {
+       if (iter == characters.end())
+-      {
+-        fail = true;
+         break;
+-      }
++
+       uint16_t character = *iter++;
+       character |= (uint16_t)(*iter++) << 8;
+       if (character == 0xfffc)