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, 3 insertions, 3 deletions

diff --git a/src/content_sao.h b/src/content_sao.h
index 39822bb62..160ac7f43 100644
--- a/src/content_sao.h
+++ b/src/content_sao.h
@@ -29,7 +29,7 @@ class UnitSAO: public ServerActiveObject
 {
 public:
 	UnitSAO(ServerEnvironment *env, v3f pos);
-	virtual ~UnitSAO() {}
+	virtual ~UnitSAO() = default;
 
 	virtual void setYaw(const float yaw) { m_yaw = yaw; }
 	float getYaw() const { return m_yaw; };
@@ -156,7 +156,7 @@ class LagPool
 	float m_pool = 15.0f;
 	float m_max = 15.0f;
 public:
-	LagPool() {}
+	LagPool() = default;
 
 	void setMax(float new_max)
 	{
@@ -323,7 +323,7 @@ public:
 		m_time_from_last_punch = 0.0;
 		return r;
 	}
-	void noCheatDigStart(v3s16 p)
+	void noCheatDigStart(const v3s16 &p)
 	{
 		m_nocheat_dig_pos = p;
 		m_nocheat_dig_time = 0;