dialog Document dependency on the PV module

modules/dialog/README

@@ -449,6 +449,7 @@ Chapter 1. Admin Guide
    The following modules must be loaded before this module:
      * TM - Transaction module
      * RR - Record-Route module
+     * PV - Pseudovariables module
 
 4.2. External Libraries or Applications
 

modules/dialog/doc/dialog_admin.xml

@@ -121,6 +121,11 @@
 				<emphasis>RR</emphasis> - Record-Route module
 			</para>
 			</listitem>
+			<listitem>
+			<para>
+				<emphasis>PV</emphasis> - Pseudovariables module
+			</para>
+			</listitem>
 			</itemizedlist>
 		</para>
 	</section>