Minor code cleanup

src/modules/mouse/sdl/Cursor.cpp

@@ -30,7 +30,7 @@ namespace sdl
 {
 
 Cursor::Cursor(image::ImageData *data, int hotx, int hoty)
-	: cursor(0)
+	: cursor(nullptr)
 	, type(CURSORTYPE_IMAGE)
 	, systemType(CURSOR_MAX_ENUM)
 {
@@ -63,7 +63,7 @@ Cursor::Cursor(image::ImageData *data, int hotx, int hoty)
 }
 
 Cursor::Cursor(mouse::Cursor::SystemCursor cursortype)
-	: cursor(0)
+	: cursor(nullptr)
 	, type(CURSORTYPE_SYSTEM)
 	, systemType(cursortype)
 {

src/modules/mouse/sdl/Mouse.cpp

@@ -71,7 +71,7 @@ const char *Mouse::getName() const
 }
 
 Mouse::Mouse()
-	: curCursor(0)
+	: curCursor(nullptr)
 {
 }
 
@@ -187,7 +187,7 @@ void Mouse::setVisible(bool visible)
 
 bool Mouse::isDown(Button *buttonlist) const
 {
-	Uint32 buttonstate = SDL_GetMouseState(0, 0);
+	Uint32 buttonstate = SDL_GetMouseState(nullptr, nullptr);
 
 	for (Button button = *buttonlist; button != BUTTON_MAX_ENUM; button = *(++buttonlist))
 	{

src/modules/mouse/wrap_Cursor.cpp

@@ -36,7 +36,7 @@ int w_Cursor_getType(lua_State *L)
 	Cursor *cursor = luax_checkcursor(L, 1);
 
 	Cursor::CursorType ctype = cursor->getType();
-	const char *typestr = 0;
+	const char *typestr = nullptr;
 
 	if (ctype == Cursor::CURSORTYPE_IMAGE)
 		mouse::Cursor::getConstant(ctype, typestr);

src/modules/mouse/wrap_Mouse.cpp

@@ -30,11 +30,11 @@ namespace love
 namespace mouse
 {
 
-static Mouse *instance = 0;
+static Mouse *instance = nullptr;
 
 int w_newCursor(lua_State *L)
 {
-	Cursor *cursor = 0;
+	Cursor *cursor = nullptr;
 
 	if (lua_isstring(L, 1) || luax_istype(L, 1, FILESYSTEM_FILE_T) || luax_istype(L, 1, FILESYSTEM_FILE_DATA_T))
 		luax_convobj(L, 1, "image", "newImageData");
@@ -212,7 +212,7 @@ static const lua_CFunction types[] =
 
 extern "C" int luaopen_love_mouse(lua_State *L)
 {
-	if (instance == 0)
+	if (instance == nullptr)
 	{
 		EXCEPT_GUARD(instance = new love::mouse::sdl::Mouse();)
 	}