WildMIDI 0.4.3

Bug-fix and maintenance update after the previous version 0.4.2.
All users of wildmidi-0.4.x are strongly encouraged to upgrade.

What's new in 0.4.3:

• New API addition: WildMidi_InitVIO(). It is like WildMidi_Init(),
  but tells the library to use caller-provided functions for file IO.
  See wildmidi_lib.h or the man page WildMidi_InitVIO(3) for details.
  This was suggested and implemented by Christian Breitwieser.
• Fixed Visual Studio optimized builds (bug #192, function ptr issue.)
• Fixed a thinko in one of the buffer size checks added in v0.4.2.
• Fixed possible out of bounds reads in sysex commands (bug #190).
• Fixed invalid reads during config parse with short patch file names.
• Do not treat a missing end-of-track marker as an error for type-0
  midi files (bug #183).
• Fixed bad reading of high delta values in XMI converter (bug #199).
• Fixed a memory leak when freeing a midi (bug #204).
• Fixed slurred/echoy playback at quick tempos on looped instruments
  (bug #185).
• Fixed certain midis sounding different compared to timidity, as if
  instruments not turned off (bug #186).
• Fixed compilation on systems without libm.
• Support for RISC OS, Nintendo Switch and PS Vita.
• Several clean-ups.