fix wxpythonlib dox generation

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43788 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/wxpythonlib.dox

@@ -1,4 +1,4 @@
-/*! \mainpage wxpythonlib GRASS WxPython-based Graphical User Interface
+/*! \page wxpythonlib GRASS WxPython-based Graphical User Interface
 
 The GUI (Graphical User Interface) is written in the Python
 programming language using <a