Misc fixing

source/backend/CarlaStandalone.cpp

@@ -2148,6 +2148,7 @@ void carla_set_panning(uint pluginId, float value)
 void carla_set_ctrl_channel(uint pluginId, int8_t channel)
 {
     CARLA_SAFE_ASSERT_RETURN(gStandalone.engine != nullptr,);
+    CARLA_SAFE_ASSERT_RETURN(channel >= -1 && channel < MAX_MIDI_CHANNELS,);
     carla_debug("carla_set_ctrl_channel(%i, %i)", pluginId, channel);
 
     if (CarlaPlugin* const plugin = gStandalone.engine->getPlugin(pluginId))
@@ -2179,7 +2180,7 @@ void carla_set_parameter_value(uint pluginId, uint32_t parameterId, float value)
 void carla_set_parameter_midi_channel(uint pluginId, uint32_t parameterId, uint8_t channel)
 {
     CARLA_SAFE_ASSERT_RETURN(gStandalone.engine != nullptr,);
-    CARLA_SAFE_ASSERT_RETURN(channel >= MAX_MIDI_CHANNELS,);
+    CARLA_SAFE_ASSERT_RETURN(channel < MAX_MIDI_CHANNELS,);
     carla_debug("carla_set_parameter_midi_channel(%i, %i, %i)", pluginId, parameterId, channel);
 
     if (CarlaPlugin* const plugin = gStandalone.engine->getPlugin(pluginId))

source/utils/CarlaStateUtils.cpp

@@ -264,9 +264,12 @@ bool StateSave::fillFromXmlElement(const XmlElement* const xmlElement)
                 }
                 else if (tag.equalsIgnoreCase("controlchannel") || tag.equalsIgnoreCase("control-channel"))
                 {
-                    const int value(text.getIntValue());
-                    if (value >= 1 && value <= MAX_MIDI_CHANNELS)
-                        ctrlChannel = static_cast<int8_t>(value-1);
+                    if (! text.startsWithIgnoreCase("n"))
+                    {
+                        const int value(text.getIntValue());
+                        if (value >= 1 && value <= MAX_MIDI_CHANNELS)
+                            ctrlChannel = static_cast<int8_t>(value-1);
+                    }
                 }
 
                 // -------------------------------------------------------