Make Clang happy with lua lauxlib.c.

No functionnal change

src/lua/src/lauxlib.c

@@ -574,7 +574,8 @@ LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
     lf.f = freopen(filename, "rb", lf.f);  /* reopen in binary mode */
     if (lf.f == NULL) return errfile(L, "reopen", fnameindex);
     /* skip eventual `#!...' */
-   while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0]) ;
+   while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0])
+	{}
     lf.extraline = 0;
   }
   ungetc(c, lf.f);