Fix compilation in release mode

svn path=/trunk/; revision=24616

reactos/ntoskrnl/dbgk/debug.c

@@ -876,11 +876,10 @@ VOID
 NTAPI
 DbgkpDeleteObject(IN PVOID Object)
 {
-    PDEBUG_OBJECT DebugObject = Object;
     PAGED_CODE();
 
     /* Sanity check */
-    ASSERT(IsListEmpty(&DebugObject->EventList));
+    ASSERT(IsListEmpty(&((PDEBUG_OBJECT)DebugObject)->EventList));
 }
 
 VOID

reactos/ntoskrnl/io/iomgr/driver.c

@@ -924,7 +924,9 @@ IopInitializeBootDrivers(VOID)
 {
     PLIST_ENTRY ListHead, NextEntry;
     PLDR_DATA_TABLE_ENTRY LdrEntry;
+#ifdef DBG
     UNICODE_STRING NtosSymName = RTL_CONSTANT_STRING(L"ntoskrnl.sym");
+#endif
     PDEVICE_NODE DeviceNode;
     PDRIVER_OBJECT DriverObject;
     LDR_DATA_TABLE_ENTRY ModuleObject;