make hpgl document height compatible with dxf (Bug 487052)

diff --git a/share/extensions/hpgl_output.py b/share/extensions/hpgl_output.py
index 4f2eee8f9f1dbf05f22b1e3b15c6e67f3474954e..a556e6180c56849f606a85ae9308d16cddead127 100644 (file)
--- a/share/extensions/hpgl_output.py
+++ b/share/extensions/hpgl_output.py
@@ -99,8 +99,8 @@ class MyEffect(inkex.Effect):
         mirror = 1.0
         if self.options.mirror:
             mirror = -1.0
-            if self.document.getroot().get('height'):
-                y0 -= float(self.document.getroot().get('height'))
+            if inkex.unittouu(self.document.getroot().xpath('@height', namespaces=inkex.NSS)[0]):
+                y0 -= float(inkex.unittouu(self.document.getroot().xpath('@height', namespaces=inkex.NSS)[0]))
         self.groupmat = [[[scale, 0.0, -x0*scale], [0.0, mirror*scale, -y0*scale]]]
         doc = self.document.getroot()
         self.process_group(doc)