clang-tidy: use member initializer

Found with cppcoreguidelines-prefer-member-initializer

Signed-off-by: Rosen Penev <[email protected]>

taglib/flac/flacmetadatablock.cpp

@@ -37,8 +37,8 @@ public:
 };
 
 FLAC::MetadataBlock::MetadataBlock()
+  : d(0)
 {
-  d = 0;
 }
 
 FLAC::MetadataBlock::~MetadataBlock()

taglib/mp4/mp4atom.cpp

@@ -38,10 +38,10 @@ const char *const MP4::Atom::containers[11] = {
 };
 
 MP4::Atom::Atom(File *file)
+  : offset(file->tell())
 {
   children.setAutoDelete(true);
 
-  offset = file->tell();
   ByteVector header = file->readBlock(8);
   if(header.size() != 8) {
     // The atom header must be 8 bytes long, otherwise there is either