contrib: taglib: don't crash with strange files

Close #7036
Patch sent upstream
(cherry picked from commit c7f19291e969c9035c098b4aa4af9c52c8bc7aae)

Conflicts:

	contrib/src/taglib/rules.mak
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

contrib/src/taglib/7036.patch

+diff --git a/taglib/mpeg/id3v2/id3v2tag.cpp b/taglib/mpeg/id3v2/id3v2tag.cpp
+index c6fe7b7..ebb1969 100644
+--- a/taglib/mpeg/id3v2/id3v2tag.cpp
++++ b/taglib/mpeg/id3v2/id3v2tag.cpp
+@@ -652,7 +652,9 @@ void ID3v2::Tag::parse(const ByteVector &origData)
+       return;
+     }
+ 
+-    Frame *frame = d->factory->createFrame(data.mid(frameDataPosition),
++    Frame *frame = NULL;
++    if (d->factory)
++        frame = d->factory->createFrame(data.mid(frameDataPosition),
+                                            &d->header);
+ 
+     if(!frame)

contrib/src/taglib/rules.mak

@@ -13,6 +13,7 @@ $(TARBALLS)/taglib-$(TAGLIB_VERSION).tar.gz:
 taglib: taglib-$(TAGLIB_VERSION).tar.gz .sum-taglib
 	$(UNPACK)
 	$(APPLY) $(SRC)/taglib/taglib-static.patch
+	$(APPLY) $(SRC)/taglib/7036.patch
 ifdef HAVE_WIN32
 	$(APPLY) $(SRC)/taglib/taglib-win32.patch
 endif