bumped the version num; fixed a collections bug introduced when fixing alpha support

svn path=/trunk/matplotlib/; revision=5635

Author: jdh2358

lib/matplotlib/__init__.py

@@ -89,7 +89,7 @@
 """
 from __future__ import generators
 
-__version__  = '0.98.0'
+__version__  = '0.98.1'
 __revision__ = '$Revision$'
 __date__     = '$Date$'
 

lib/matplotlib/backend_bases.py

@@ -262,7 +262,7 @@ def _iter_collection(self, path_ids, cliprect, clippath, clippath_trans,
                     gc.set_linewidth(linewidths[i % Nlinewidths])
                 if Nlinestyles:
                     gc.set_dashes(*linestyles[i % Nlinestyles])
-            if len(rgbFace)==4:
+            if rgbFace is not None and len(rgbFace)==4:
                 gc.set_alpha(rgbFace[-1])
                 rgbFace = rgbFace[:3]
             gc.set_antialiased(antialiaseds[i % Naa])