--- loncom/homework/randomlabel.pm	2005/06/07 22:31:30	1.77
+++ loncom/homework/randomlabel.pm	2005/06/28 14:58:23	1.78
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # random labelling tool
 #
-# $Id: randomlabel.pm,v 1.77 2005/06/07 22:31:30 foxr Exp $
+# $Id: randomlabel.pm,v 1.78 2005/06/28 14:58:23 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -206,15 +206,18 @@ sub end_bgimg {
 	    # If the  tag produced has sizes, they override ours.
 	    # (for now anyway).
 	    #
-
 	    &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
 	
 	    my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg, 
 						       $width_param,
-						       $height_param );
+						       $height_param);
 	    &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
-	    $label_xscale         = $plot_x / $width_param;
-	    $label_yscale         = $plot_y / $height_param;
+	    if ($width_param) {
+		$label_xscale     = $plot_x / $width_param;
+	    }
+	    if ($height_param) {
+		$label_yscale     = $plot_y / $height_param;
+	    }
 	    &Apache::lonxml::debug("Scale factors:   $label_xscale $label_yscale");
 
 	    &Apache::lonxml::debug("Image: $bgimg");
@@ -272,8 +275,6 @@ sub end_bgimg {
 		$Apache::lonxml::debug = 0;
 
 	    } else {
-		
-		
 		$result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
 	    }
 	}