Remove extraneous semicolon from fatal/type/impl/trie.h

Summary:
Extraneous semicolons are a code smell and can mask more serious problems. `-Wextra-semi-stmt` finds them.

This diff removes an extraneous semicolon or adjusts a macro so that a semicolon is required after the macro (making it look like a standard function).

This file is drawn from a heavy-hitting list, so fixing this problem will allow *many* other files to take advantage of the safety `-Wextra-semi-stmt` offers.

This should be a low-risk diff: if it compiles, it works.

Reviewed By: meyering

Differential Revision: D51631110

fbshipit-source-id: b639984664d990dbf97d1f366f54449ed98ae9ca

fatal/type/impl/trie.h

@@ -107,7 +107,7 @@ struct l<Offset, Filter, n<Haystack, IsTerminal, Begin, End, Children...>> {
 
     if (!IsTerminal && size == End - Begin - Offset) {
       return false;
-    };
+    }
 
     using value_type = typename std::iterator_traits<
       typename std::decay<NeedleBegin>::type