Fix the uninitialized variable pCurPreset by setting it to nullptr.
Please note that it looks as if the nullptr is now being passed to the
function fluid_sfont_iteration_next_wrapper. However, the function does
not use the parameter anyway and then the variable is set to the result
of that function.
This PR places all LMMS symbols into namespaces to eliminate any potential future name collisions between LMMS and third-party modules.
Also, this PR changes back `LmmsCore` to `Engine`, reverting c519921306 .
Co-authored-by: allejok96 <allejok96@gmail.com>
No functional changes! No changes to savefiles/presets!
Fixes casing of everything that is currently lowercase but should
be uppercase.
Fixes also some other plugin strings, especially:
* opl2 -> OpulenZ (see 289887f4fc)
* calf -> veal (see ae291e0709)
* ladspa_effect -> LadspaEffect (see 9c9372f0c8)
* remove flp_import (see 2d1813fb64)
