Update tResample.cpp

Improve raster resampling logic, print x,y coordinates when FindNormal found Zero Vector

src/tRasTin/tResample.cpp

@@ -349,6 +349,7 @@ tArray< double > tResample::FindNormal(double d, double x1, double y1,
 	tmp = x1*x1+y1*y1;
 	if ( fabs(tmp) <= 1.0E-9) {
 		cout<<"\ntResample::FindNormal found Zero Vector!..."<<endl;
+		cout<<"X-coordinate = "<<x1<<", Y-coordinate = "<<y1<<endl;
 		cout<<"Change the TIN Mesh"<<endl;
 		cout<<"Exiting Program..."<<endl;
 		exit(2);