Add some missing 'override' keywords

source/backend/engine/CarlaEngineGraph.cpp

@@ -1193,7 +1193,7 @@ public:
         return fPlugin->getName();
     }
 
-    void processBlock(AudioSampleBuffer& audio, MidiBuffer& midi)
+    void processBlock(AudioSampleBuffer& audio, MidiBuffer& midi) override
     {
         if (fPlugin == nullptr || ! fPlugin->isEnabled())
         {

source/backend/plugin/CarlaPluginBridge.cpp

@@ -802,7 +802,7 @@ public:
     // -------------------------------------------------------------------
     // Information (base)
 
-    BinaryType getBinaryType() const noexcept
+    BinaryType getBinaryType() const noexcept override
     {
         return fBinaryType;
     }

source/backend/plugin/CarlaPluginDSSI.cpp

@@ -522,7 +522,7 @@ public:
     // -------------------------------------------------------------------
     // Set data (internal stuff)
 
-    void setId(const uint newId) noexcept
+    void setId(const uint newId) noexcept override
     {
         CarlaPlugin::setId(newId);