typo in rbtree remove

[scturtle]

switch-examples/graphics/deko3d/deko_examples/source/SampleFramework/CIntrusiveTree.cpp

Line 195 in b55cb17

child = node->left() ? node->right() : node->left();

should be child = node->left() ? node->left() : node->right();

according to

https://github.com/devkitPro/libctru/blob/59cf50c2018ba86cbf44420f7c3cf4420deecba4/libctru/source/util/rbtree/rbtree_remove.c#L110-L113

[scturtle]

switch-examples/graphics/deko3d/deko_examples/source/SampleFramework/CIntrusiveTree.h

Line 176 in b55cb17

bool empty() const { return m_root != nullptr; }

shoud be bool empty() const { return m_root == nullptr; }

[fincs]

Thank you for spotting these. Feel free to submit a PR to fix them :)