Avoid assertion warning with an expected null value

source/backend/engine/CarlaEngineClient.cpp

@@ -260,7 +260,7 @@ bool CarlaEngineClient::removePort(const EnginePortType portType, const char* co
 #ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
 CarlaEngineCVSourcePorts* CarlaEngineClient::createCVSourcePorts()
 {
-    pData->cvSourcePorts.setGraphAndPlugin(pData->egraph.getPatchbayGraph(), pData->plugin);
+    pData->cvSourcePorts.setGraphAndPlugin(pData->egraph.getPatchbayGraphOrNull(), pData->plugin);
     return &pData->cvSourcePorts;
 }
 #endif

source/backend/engine/CarlaEngineClient.hpp

@@ -81,9 +81,9 @@ public:
     }
 
 protected:
-    inline PatchbayGraph* getPatchbayGraph() const noexcept
+    inline PatchbayGraph* getPatchbayGraphOrNull() const noexcept
     {
-        return pData->egraph.getPatchbayGraph();
+        return pData->egraph.getPatchbayGraphOrNull();
     }
 
     inline CarlaPlugin* getPlugin() const noexcept

source/backend/engine/CarlaEngineGraph.cpp

@@ -2490,6 +2490,11 @@ PatchbayGraph* EngineInternalGraph::getPatchbayGraph() const noexcept
     return fPatchbay;
 }
 
+PatchbayGraph* EngineInternalGraph::getPatchbayGraphOrNull() const noexcept
+{
+    return fIsRack ? nullptr : fPatchbay;
+}
+
 void EngineInternalGraph::process(CarlaEngine::ProtectedData* const data, const float* const* const inBuf, float* const* const outBuf, const uint32_t frames)
 {
     if (fIsRack)

source/backend/engine/CarlaEngineInternal.hpp

@@ -88,6 +88,7 @@ public:
 
     RackGraph*     getRackGraph() const noexcept;
     PatchbayGraph* getPatchbayGraph() const noexcept;
+    PatchbayGraph* getPatchbayGraphOrNull() const noexcept;
 
     void process(CarlaEngine::ProtectedData* data, const float* const* inBuf, float* const* outBuf, uint32_t frames);
 

source/backend/engine/CarlaEngineJack.cpp

@@ -885,7 +885,7 @@ public:
 #ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
     CarlaEngineCVSourcePorts* createCVSourcePorts() override
     {
-        fCVSourcePorts.setGraphAndPlugin(getPatchbayGraph(), getPlugin());
+        fCVSourcePorts.setGraphAndPlugin(getPatchbayGraphOrNull(), getPlugin());
         return &fCVSourcePorts;
     }