Fixes to make extended multiplexing code work properly, implementation

of nested multiplexing in main screen for interpretation.

Overall, it's ugly but mostly functional at this point.

dbc/dbc_classes.h

@@ -116,6 +116,7 @@ public: //TODO: this is sloppy. It shouldn't all be public!
     bool processAsInt(const CANFrame &frame, int32_t &outValue);
     bool processAsDouble(const CANFrame &frame, double &outValue);
     QString makePrettyOutput(double floatVal, int64_t intVal, bool outputName = true, bool isInteger = false);
+    QString processSignalTree(const CANFrame &frame);
     DBC_ATTRIBUTE_VALUE *findAttrValByName(QString name);
     DBC_ATTRIBUTE_VALUE *findAttrValByIdx(int idx);
 
@@ -123,6 +124,9 @@ public: //TODO: this is sloppy. It shouldn't all be public!
     {
         return (l.name.toLower() < r.name.toLower());
     }
+private:
+    bool isSignalInMessage(const CANFrame &frame);
+    bool _sigInMsgPriv(const CANFrame &frame, DBC_SIGNAL *multiplexor);
 };
 
 class DBCSignalHandler; //forward declaration to keep from having to include dbchandler.h in this file and thus create a loop