settings_data: Fix some mismatched printf specifiers
Merge pull request #976 from lioncash/printfs

settings_data: Fix some mismatched printf specifiers
(D3D) RenderChain class is gone so get rid of this
(D3D) uniquely name header guard name for d3d_font.h
Merge pull request #977 from lioncash/deref

dinput: Guard against the case where malloc fails
Indenting/style nits
settings_data: Guard against possible null pointer dereferences