coverity#1209529 Explicit null dereferenced

Change-Id: I3d5f1880deaa43fd4d40f456c0d265c18bb9b9c5

sw/source/core/doc/SwStyleNameMapper.cxx

@@ -468,9 +468,7 @@ const NameToIdHash & SwStyleNameMapper::getHashTable ( SwGetPoolIdFromName eFlag
         break;
         default:
         {
-            // TODO: Is there a better way of failing here?
-            *pHashPointer = new NameToIdHash( 0 );
-            return **pHashPointer;
+            assert(false && "unknown pool family");
         }
         break;
     }