Prevent crash in channel mapper when loading a config file with more channels that available

Source/Processors/ChannelMappingNode/ChannelMappingEditor.cpp

@@ -1026,6 +1026,9 @@ String ChannelMappingEditor::loadPrbFile(File filename)
 
     std::cout << "We found this many: " << map->size() << std::endl;
 
+	if (map->size() > previousChannelCount)
+		createElectrodeButtons(map->size(), false);
+
     for (int i = 0; i < map->size(); i++)
     {
         int ch = map->getUnchecked(i); 
@@ -1046,6 +1049,7 @@ String ChannelMappingEditor::loadPrbFile(File filename)
 		getProcessor()->setParameter(1, rf);
 		getProcessor()->setParameter(3, en ? 1 : 0);
     }
+	checkUnusedChannels();
 
     var refChans = json[Identifier("refs")];
     var channels = refChans[Identifier("channels")];