vl: Remove useless 'continue'

"This if else has no code between it and the end of the enclosing
while loop. This makes this continue redundant."

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

vl.c

@@ -3042,7 +3042,6 @@ int main(int argc, char **argv, char **envp)
         if (argv[optind][0] != '-') {
             /* disk image */
             optind++;
-            continue;
         } else {
             const QEMUOption *popt;