A few more build fixes

Signed-off-by: falkTX <falktx@falktx.com>

plugins/Makefile

@@ -610,6 +610,8 @@ MINIPLUGIN_FILES += BogaudioModules/src/dsp/noise.cpp
 MINIPLUGIN_FILES += BogaudioModules/src/dsp/oscillator.cpp
 MINIPLUGIN_FILES += BogaudioModules/src/dsp/signal.cpp
 MINIPLUGIN_FILES += BogaudioModules/src/dsp/table.cpp
+MINIPLUGIN_FILES += BogaudioModules/src/dsp/filters/experiments.cpp
+MINIPLUGIN_FILES += BogaudioModules/src/dsp/filters/filter.cpp
 MINIPLUGIN_FILES += BogaudioModules/src/dsp/filters/multimode.cpp
 MINIPLUGIN_FILES += BogaudioModules/src/dsp/filters/resample.cpp
 

src/PluginContext.hpp

@@ -53,6 +53,8 @@ enum CardinalVariant {
     kCardinalVariantSynth,
 };
 
+class UI;
+
 // -----------------------------------------------------------------------------------------------------------
 
 struct CardinalPluginContext : rack::Context {