2665: PDF: Paginate error in descendant chart (graphical) on person without descendants

svn: r11986

src/plugins/docgen/CairoDoc.py

@@ -1444,6 +1444,9 @@ class CairoDoc(BaseDoc.BaseDoc, BaseDoc.TextDoc, BaseDoc.DrawDoc):
             self._available_height = page_height
         
         # try to fit the next element to current page, divide it if needed
+        if not self._elements_to_paginate:
+            #this is a self._doc where nothing has been added. Empty page.
+            return True
         elem = self._elements_to_paginate.pop(0)
         (e1, e2), e1_h = elem.divide(layout,
                                      page_width,

src/plugins/drawreport/DescendTree.py

@@ -268,7 +268,11 @@ class DescendTree(Report):
     def write_report(self):
 
         (maxy,maxx) = self.genchart.dimensions()
-        maxx = (maxx-1)*2
+        if maxx <> 1:
+            maxx = (maxx-1)*2
+        else:
+            #no descendants
+            maxx = 1
         maxh = int((self.uh-0.75)/(self.box_height*1.25))
 
         if self.force_fit: