(svg_load_image): Check for failure in return value of

rsvg_handle_get_pixbuf.  Free rsvg handle when done.

src/image.c

@@ -9024,7 +9024,9 @@ svg_load_image (f, img, contents, size)
   /* We can now get a valid pixel buffer from the svg file, if all
      went ok.  */
   pixbuf = fn_rsvg_handle_get_pixbuf (rsvg_handle);
-  eassert (pixbuf);
+  if (!pixbuf)
+    goto rsvg_error;
+  fn_rsvg_handle_free (rsvg_handle);
 
   /* Extract some meta data from the svg handle.  */
   width     = fn_gdk_pixbuf_get_width (pixbuf);