Fix ARI warning on gdb/typeprint.c:whatis_exp

Fix ARI warning on gdb/typeprint.c:whatis_exp

I forgot to indent the "if" clause properly and put the "&&" at the
beginning of the line, so ARI complained.  This commit fixed it.

gdb/ChangeLog:
2017-12-15  Sergio Durigan Junior  <sergiodj@redhat.com>

	* typeprint.c (whatis_exp): Fix ARI warning and reindent "if"
	condition.