Merge branch 'divbyzero' of https://github.com/erilyth/sugar-toolkit-gtk3

src/sugar3/graphics/palettewindow.py

@@ -973,6 +973,10 @@ class Invoker(GObject.GObject):
 
             ih = 0
             
+            if palette_dim.width == 0:
+                ph = 0
+
+            else:
                 # Set palette_halign to align to screen on left
                 if dleft > dright:
                     ph = -float(dleft) / palette_dim.width