g.gui.psmap: add screenshot to manual page

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@55083 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/psmap/g.gui.psmap.html

@@ -23,6 +23,12 @@ Possible output files:
   <li> PDF (using ps2pdf)
 </ul>
 
+<center>
+<br>
+<img src="psmap_frame.jpg" border="1" alt="wxGUI Cartographic Composer">
+<br><br>
+</center>
+
 <p>
 Cartographic Composer enables to load in saved instructions file. It
 works better with files created by wx.psmap (more tested).