Use string based UniversalId to check script for blacklist

Blacklist is a vector of strings and isBlacklisted internally calls getId which
throws exception for RefId based UniversalId.

apps/opencs/model/tools/scriptcheck.cpp

@@ -106,7 +106,7 @@ void CSMTools::ScriptCheckStage::perform(int stage, CSMDoc::Messages& messages)
 
     mId = mDocument.getData().getScripts().getId(stage);
 
-    if (mDocument.isBlacklisted(CSMWorld::UniversalId(CSMWorld::UniversalId::Type_Script, mId)))
+    if (mDocument.isBlacklisted(CSMWorld::UniversalId(CSMWorld::UniversalId::Type_Script, mId.getRefIdString())))
         return;
 
     // Skip "Base" records (setting!) and "Deleted" records