Modernize src/c* src/d* and src/e* files (#6263)

* Modernize src/c* src/d* and src/e* files

* default operator
* redundant init
* delete default constructors on CraftDefinition childs (never used)
* fix some missing init values
* const ref fix reported by clang-tidy
* ranged-based for loops
* simple conditions & returns
* empty stl function instead of size
* emplace_back stl function instead of push_back + construct temp obj
* auto for some iterators
* code style fixes
* c++ stl headers instead of C stl headers (stdio.h -> cstdio)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/database-files.h b/src/database-files.h
index 80af42308..f0824a304 100644
--- a/src/database-files.h
+++ b/src/database-files.h
@@ -29,7 +29,7 @@ class PlayerDatabaseFiles : public PlayerDatabase
 {
 public:
 	PlayerDatabaseFiles(const std::string &savedir) : m_savedir(savedir) {}
-	virtual ~PlayerDatabaseFiles() {}
+	virtual ~PlayerDatabaseFiles() = default;
 
 	void savePlayer(RemotePlayer *player);
 	bool loadPlayer(RemotePlayer *player, PlayerSAO *sao);