Add blc_command_forward_blc_channels() for Reverse Polish notation

o_gnuplot/src/o_gnuplot.cpp

@@ -48,7 +48,7 @@ int main(int argc, char *argv[]){
 
 	//   blc_program_add_option(&size_str, 's', "size", "UI32[xUI32]", "size of the matrix", NULL);
 	blc_program_init(&argc, &argv, blc_quit);
-
+    blc_command_forward_blc_channels();
 /*
 	if (size_str){
 		dims_nb=blc_sscan_dims(&lengths, size_str);

o_gnuplot_poi/o_gnuplot_poi.cpp

@@ -34,6 +34,8 @@ int main(int argc, char *argv[]){
 
 	//   blc_program_add_option(&size_str, 's', "size", "UI32[xUI32]", "size of the matrix", NULL);
 	blc_program_init(&argc, &argv, blc_quit);
+    blc_command_forward_blc_channels();
+
 
 	input_image.open(input_image_name, BLC_CHANNEL_READ);
     poi.open(poi_name, BLC_CHANNEL_READ);