Bug#960256: drumgizmo FTBFS with lv2-dev 1.18.0-1

[Adrian Bunk <bunk@debian.org>]

Source: drumgizmo
Version: 0.9.18.1-1
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/drumgizmo.html

...
../plugin/plugingizmo/pluginlv2.cc:687:13: error: invalid conversion from 'void* (*)(const _LV2_Descriptor*, double, const char*, const LV2_Feature* const*)' to 'void* (*)(const LV2_Descriptor*, double, const char*, const LV2_Feature* const*)' [-fpermissive]
  687 |  PluginLV2::instantiate,
      |  ~~~~~~~~~~~^~~~~~~~~~~
      |             |
      |             void* (*)(const _LV2_Descriptor*, double, const char*, const LV2_Feature* const*)
../plugin/plugingizmo/pluginlv2.cc:726:13: error: invalid conversion from 'void* (*)(const _LV2UI_Descriptor*, const char*, const char*, LV2UI_Write_Function, LV2UI_Controller, void**, const LV2_Feature* const*)' {aka 'void* (*)(const _LV2UI_Descriptor*, const char*, const char*, void (*)(void*, unsigned int, unsigned int, unsigned int, const void*), void*, void**, const LV2_Feature* const*)'} to 'void* (*)(const LV2UI_Descriptor*, const char*, const char*, LV2UI_Write_Function, LV2UI_Controller, void**, const LV2_Feature* const*)' {aka 'void* (*)(const LV2UI_Descriptor*, const char*, const char*, void (*)(void*, unsigned int, unsigned int, unsigned int, const void*), void*, void**, const LV2_Feature* const*)'} [-fpermissive]
  726 |  PluginLV2::uiInstantiate,
      |  ~~~~~~~~~~~^~~~~~~~~~~~~
      |             |
      |             void* (*)(const _LV2UI_Descriptor*, const char*, const char*, LV2UI_Write_Function, LV2UI_Controller, void**, const LV2_Feature* const*) {aka void* (*)(const _LV2UI_Descriptor*, const char*, const char*, void (*)(void*, unsigned int, unsigned int, unsigned int, const void*), void*, void**, const LV2_Feature* const*)}
make[4]: *** [Makefile:769: drumgizmo_la-pluginlv2.lo] Error 1