Fixes to make graphing of multiplexed signals work properly

dbc/dbc_classes.h

@@ -120,14 +120,12 @@ public: //TODO: this is sloppy. It shouldn't all be public!
     QString processSignalTree(const CANFrame &frame);
     DBC_ATTRIBUTE_VALUE *findAttrValByName(QString name);
     DBC_ATTRIBUTE_VALUE *findAttrValByIdx(int idx);
+    bool isSignalInMessage(const CANFrame &frame);
 
     friend bool operator<(const DBC_SIGNAL& l, const DBC_SIGNAL& r)
     {
         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