geoTiff: add fatal error if out of bound

modules/slimFunction/slimPreEvaluatorGeoTIFF.cpp

@@ -122,6 +122,8 @@ double slimPreEvaluatorGeoTIFF::evaluate(double x, double y, double z) {
   }
   if(!GTIFPCSToImage(_gtif, &x, &y))
       return 0;
+  if(x<0 || x>_sizex || y<0 || y>_sizey)
+    Msg::Fatal("error reading tiff file, out of boundary\n");
   int x0 = std::min(_sizex-1,std::max(0, (int)floor(x)));
   int x1 = std::min(_sizex-1,std::max(0, (int)ceil(x)));
   int y0 = std::min(_sizey-1,std::max(0, (int)floor(y)));