Fix lv2 midi programs not reaching plugin bridges

source/backend/plugin/CarlaPlugin.cpp

@@ -1327,7 +1327,7 @@ void CarlaPlugin::setProgram(const int32_t index, const bool sendGui, const bool
     }
 
     // may be unused
-    return; (void)sendGui; (void)sendOsc;
+    return; (void)sendOsc;
 }
 
 void CarlaPlugin::setMidiProgram(const int32_t index, const bool sendGui, const bool sendOsc, const bool sendCallback) noexcept
@@ -1360,7 +1360,7 @@ void CarlaPlugin::setMidiProgram(const int32_t index, const bool sendGui, const
     }
 
     // may be unused
-    return; (void)sendGui; (void)sendOsc;
+    return; (void)sendOsc;
 }
 
 void CarlaPlugin::setMidiProgramById(const uint32_t bank, const uint32_t program, const bool sendGui, const bool sendOsc, const bool sendCallback) noexcept

source/backend/plugin/CarlaPluginLV2.cpp

@@ -3971,7 +3971,7 @@ public:
         if (fUI.type == UI::TYPE_BRIDGE)
         {
             if (fPipeServer.isPipeRunning())
-                fPipeServer.writeProgramMessage(index);
+                fPipeServer.writeMidiProgramMessage(pData->midiprog.data[index].bank, pData->midiprog.data[index].program);
         }
         else
         {

source/utils/CarlaPipeUtils.cpp

@@ -913,7 +913,7 @@ void CarlaPipeCommon::writeMidiProgramMessage(const uint32_t bank, const uint32_
 
     const CarlaMutexLocker cml(pData->writeLock);
 
-    _writeMsgBuffer("midiprogram\n", 8);
+    _writeMsgBuffer("midiprogram\n", 12);
 
     {
         std::snprintf(tmpBuf, 0xff, "%i\n", bank);