Assume nPageNum shall be compared against 0 or 1 here

...depending on DOCUMENT_TYPE_IMPRESS, similar to how the nPgNum argument to the
SdDrawDocument::GetMasterSdPage call a few lines up is computed.

Change-Id: I8a13ac72868d96d486c071a4a705268dd888c1eb

sd/source/ui/annotations/annotationmanager.cxx

@@ -1171,7 +1171,7 @@ SdPage* AnnotationManagerImpl::GetNextPage( SdPage* pPage, bool bForeward )
         }
         else
         {
-            if( nPageNum == (mpDoc->GetDocumentType() == DOCUMENT_TYPE_IMPRESS) ? 0 : 1 )
+            if( nPageNum == (mpDoc->GetDocumentType() == DOCUMENT_TYPE_IMPRESS ? 0 : 1) )
             {
                 // we reached beginning of master pages, start with end if pages
                 return mpDoc->GetSdPage( mpDoc->GetSdPageCount(PK_STANDARD)-1, PK_STANDARD );