matplotlib#2150 work in progress. Patch limits get updated even if width or height of a patch might be 0 (but not if both width and height are 0).

Author: sfroid

CHANGELOG

@@ -1,3 +1,6 @@
+2014-03-24 Changed the behaviour of axes to not ignore leading or trailing
+           patches of height 0 while calculating the x and y axis limits.
+
 2014-03-17 Bug was fixed in append_axes from the AxesDivider class would not
            append axes in the right location with respect to the reference
            locator axes

lib/matplotlib/axes/_base.py

@@ -1546,7 +1546,7 @@ def _update_patch_limits(self, patch):
 
         # cannot check for '==0' since unitized data may not compare to zero
         if (isinstance(patch, mpatches.Rectangle) and
-            ((not patch.get_width()) or (not patch.get_height()))):
+            ((not patch.get_width()) and (not patch.get_height()))):
             return
         vertices = patch.get_path().vertices
         if vertices.size > 0: