[librsvg] rsvg-convert: Catch the case where the SVG has no dimensions

[Federico Mena Quintero <federico src gnome org>]

commit 8058ebef6dae3cf26f6995acd2078b2d1159d8db
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu May 23 19:38:54 2019 -0500

    rsvg-convert: Catch the case where the SVG has no dimensions

 rsvg-convert.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/rsvg-convert.c b/rsvg-convert.c
index 78054523..2df9546a 100644
--- a/rsvg-convert.c
+++ b/rsvg-convert.c
@@ -417,6 +417,11 @@ main (int argc, char **argv)
                 exit (1);
             }
 
+            if (dimensions.width == 0 || dimensions.height == 0) {
+                g_printerr ("The SVG %s has no dimensions\n", args[i]);
+                exit (1);
+            }
+
             unscaled_width = dimensions.width;
             unscaled_height = dimensions.height;