tdf#113736 Default value PDF export placeholders=false

Default value for 'Export placeholders' in dialog 'Export as PDF...'
should be false like in the print dialog

Change-Id: Ib68a0921bfcb62849774c1388b0d77761384a130
Reviewed-on: https://gerrit.libreoffice.org/44546Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

officecfg/registry/schema/org/openoffice/Office/Common.xcs

@@ -4821,7 +4821,7 @@
             <info>
               <desc>Specifies if placeholder fields are exported to PDF.</desc>
             </info>
-            <value>true</value>
+            <value>false</value>
           </prop>
           <prop oor:name="OpenBookmarkLevels" oor:type="xs:int" oor:nillable="false">
             <info>