Fix tokenizer not ignoring newlines...

...at the end of inlined preprocessor directives when textdomains are
used in the middle of concatenated WML strings.

src/serialization/tokenizer.cpp

@@ -93,6 +93,7 @@ const token& tokenizer::next_token()
 				next_char();
 			if (current_ == 254) {
 				skip_comment();
+				--lineno_;
 				continue;
 			}