added missing </sect2>

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@1195 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter02/askforhelp.xml

@@ -38,6 +38,8 @@ script is run, look at the last lines of the
 encoutered during configure which aren't always printed to the screen.
 Include those relevant lines if you decide to ask for help.</para>
 
+</sect2>
+
 <sect2>
 <title>Compile problems</title>