Fix MIDI input on JACK Rack mode

source/backend/engine/CarlaEngineJack.cpp

@@ -1261,7 +1261,7 @@ protected:
 
                 for (uint32_t jackEventIndex=0; jackEventIndex < jackEventCount; ++jackEventIndex)
                 {
-                    if (jackbridge_midi_event_get(&jackEvent, eventIn, jackEventIndex) != 0)
+                    if (! jackbridge_midi_event_get(&jackEvent, eventIn, jackEventIndex))
                         continue;
 
                     EngineEvent* const engineEvent(&kData->bufEvents.in[engineEventIndex++]);

source/backend/native/nekobi/DistrhoPluginNekobi.cpp

@@ -159,7 +159,7 @@ DistrhoPluginNekobi::DistrhoPluginNekobi()
 
 DistrhoPluginNekobi::~DistrhoPluginNekobi()
 {
-    free(fSynth->voice);
+    std::free(fSynth->voice);
     delete fSynth;
 }
 

source/backend/native/nekobi/NekoWidget.hpp

@@ -80,7 +80,7 @@ public:
         if (fTimer == fTimerSpeed*9)
         {
             if (fCurAction == kActionNone)
-                fCurAction = static_cast<Action>(rand() % kActionCount);
+                fCurAction = static_cast<Action>(std::rand() % kActionCount);
             else
                 fCurAction = kActionNone;