Fix screen_init() regression introduced in a6290da

A simple missing semicolon caused initscr() to not be called properly.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/util.c

@@ -76,7 +76,7 @@ char *sanitize(char *arg, size_t len)
 void screen_init(void)
 {
 	if (!isatty(STDOUT_FILENO))
-		return
+		return;
 
 	initscr(&screen_rows, &screen_cols);
 }