Issue 5175 - Reject element hiding filter with empty domain names

compiled/filter/RegExpFilter.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 343 matching lines @@
       type[i] = (item.first[i] == '-' ? '_' : toupper(item.first[i]));
     printf("  %s: %i,\n", type.c_str(), item.second);
   }
   printf("};\n");
 }
 
 RegExpFilter::DomainMap* RegExpFilter::GetDomains() const
 {
   if (!mData.DomainsParsingDone())
   {
-    ParseDomains(mData.GetDomainsSource(mText), u'|');
+    ParseDomains(mData.GetDomainsSource(mText), u'|', true);
     mData.SetDomainsParsingDone();
   }
   return ActiveFilter::GetDomains();
 }
 
 RegExpFilter::SitekeySet* RegExpFilter::GetSitekeys() const
 {
   if (!mData.SitekeyParsingDone())
   {
     ParseSitekeys(mData.GetSitekeysSource(mText));
@@ skipping 13 matching lines @@
     return false;
   }
 
   if (!mData.RegExpParsingDone())
   {
     const OwnedString pattern(mData.GetRegExpSource(mText));
     mData.SetRegExp(GenerateRegExp(RegExpFromSource(pattern), mData.mMatchCase));
   }
   return TestRegExp(mData.mRegexpId, location);
 }