Obsolete python-matplotlib-wx for clean updates.

The python-matplotlib-wx package was only two python files (sans pyc & pyo),
that actually now are merged in the main package. This is a packaging issue
that should be corrected by also adding extra backend subpackages, but those
need extra packages in fedora. There are actually several other backends
that were in the main package, but the ones with .so files are split (main
package and tk backend).

python-matplotlib.spec

@@ -9,7 +9,7 @@
 
 Name:           python-matplotlib
 Version:        1.2.0
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Python 2D plotting library
 Group:          Development/Libraries
 License:        Python
@@ -41,6 +41,7 @@ Requires:       pycairo
 Requires:       pyparsing
 Requires:       python-dateutil
 Requires:       pytz
+Obsoletes:	%{name}-wx < %{version}-%{release}
 
 %description
 Matplotlib is a python 2D plotting library which produces publication
@@ -232,6 +233,9 @@ popd
 %endif
 
 %changelog
+* Tue Nov 27 2012 pcpa <paulo.cesar.pereira.de.andrade@gmail.com> - 1.2.0-4
+- Obsolete python-matplotlib-wx for clean updates.
+
 * Tue Nov 27 2012 pcpa <paulo.cesar.pereira.de.andrade@gmail.com> - 1.2.0-3
 - Enable python 3 in fc18 as build requires are now available (#879731)