Prettifyed the code exploiting inheritance rules

added missing comma, added missing `override`

--HG--
branch : minor

src/modules/sound/SoundData.cpp

@@ -124,7 +124,7 @@ SoundData::~SoundData()
 		free(data);
 }
 
-Data *SoundData::clone() const
+SoundData *SoundData::clone() const
 {
 	return new SoundData(*this);
 }

src/modules/sound/SoundData.h

@@ -45,7 +45,7 @@ public:
 	virtual ~SoundData();
 
 	// Implements Data.
-	Data *clone() const;
+	SoundData *clone() const;
 	void *getData() const;
 	size_t getSize() const;
 

src/modules/sound/wrap_SoundData.cpp

@@ -44,8 +44,8 @@ SoundData *luax_checksounddata(lua_State *L, int idx)
 
 int w_SoundData_clone(lua_State *L)
 {
-	SoundData *t = luax_checksounddata(L, 1)*c = nullptr;
-	luax_catchexcept(L, [&](){ c = (SoundData*)t->clone(); });
+	SoundData *t = luax_checksounddata(L, 1), *c = nullptr;
+	luax_catchexcept(L, [&](){ c = t->clone(); });
 	luax_pushtype(L, c);
 	c->release();
 	return 1;