Use namespace for static taglib to avoid collision with taglib

linked to vlc

src/config.h.in

@@ -55,6 +55,7 @@
 #cmakedefine HAVE_KEYSYMDEF_H
 #cmakedefine HAVE_XF86KEYSYM_H
 
+#cmakedefine USE_SYSTEM_TAGLIB
 #cmakedefine USE_BUNDLE
 
 #define USE_BUNDLE_DIR "${USE_BUNDLE_DIR}"

src/core/song.cpp

@@ -69,6 +69,9 @@
 #include "tagreadermessages.pb.h"
 
 using std::sort;
+#ifndef USE_SYSTEM_TAGLIB
+using namespace Strawberry_TagLib;
+#endif
 
 const QStringList Song::kColumns = QStringList() << "title"
                                                  << "album"