Changed the default type value to "none" because "-1" is not a valid value.

OpenRoadEd/OpenDrive/ObjectSignal.cpp

@@ -11,7 +11,7 @@ Object::Object()
   mOrientation="none";
   mZOffset=0.0;
   mValidLength=0.0;
-  mType="-1";
+  mType="none";
   mSubType="-1";
   mHeading=0.0;
   mPitch=0.0;
@@ -30,7 +30,7 @@ Object::Object(std::string &name,std::string &id)
   mOrientation="none";
   mZOffset=0.0;
   mValidLength=0.0;
-  mType="-1";
+  mType="none";
   mSubType="-1";
   mHeading=0.0;
   mPitch=0.0;