Add dependence from pnp_client also, since in fact it uses it (includes pnp_c.h). It worked before only because lib/setupapi depends on pnp_c, and it's build earlier than umpnpmgr.
Modified: trunk/reactos/services/umpnpmgr/umpnpmgr.xml

Modified: trunk/reactos/services/umpnpmgr/umpnpmgr.xml
--- trunk/reactos/services/umpnpmgr/umpnpmgr.xml	2005-07-09 10:31:30 UTC (rev 16522)
+++ trunk/reactos/services/umpnpmgr/umpnpmgr.xml	2005-07-09 13:23:05 UTC (rev 16523)
@@ -1,6 +1,7 @@
 <module name="umpnpmgr" type="win32cui" installbase="system32" installname="umpnpmgr.exe">
 	<include base="umpnpmgr">.</include>
 	<include base="pnp_server">.</include>
+	<include base="pnp_client">.</include>
 	<define name="__USE_W32API" />
 	<define name="UNICODE" />
 	<define name="_UNICODE" />