HP's compiler won't allow deletes of void *... so a base type is needed.

I talked this over with Bienvenu and since the code will be switched
eventually to nsCString, the change is ok.

mailnews/db/msgdb/src/nsDBFolderInfo.cpp

@@ -696,7 +696,7 @@ nsresult nsDBFolderInfo::SetPropertyWithToken(mdb_token aProperty, nsString *pro
 	if (m_mdbRow)
 	{
 		nsresult err = m_mdbRow->AddColumn(m_mdb->GetEnv(), aProperty, m_mdb->nsStringToYarn(&yarn, propertyStr));
-		delete[] yarn.mYarn_Buf;	// won't need this when we have nsCString
+		delete[] (char *)yarn.mYarn_Buf;	// won't need this when we have nsCString
 		return err;
 	}
 	else

mailnews/db/msgdb/src/nsMsgHdr.cpp

@@ -208,7 +208,7 @@ NS_IMETHODIMP nsMsgHdr::SetProperty(const char *propertyName, nsString &property
 
 		yarn.mYarn_Grow = NULL;
 		err = m_mdbRow->AddColumn(m_mdb->GetEnv(), property_token, m_mdb->nsStringToYarn(&yarn, &propertyStr));
-		delete[] yarn.mYarn_Buf;	// won't need this when we have nsCString
+		delete[] (char *)yarn.mYarn_Buf;	// won't need this when we have nsCString
 	}
 	return err;
 }