The variable nargv is allocated but never freed, so free it when the it

is no longer used.

Submitted by:	Thomas Rix <trix@juniper.net>
Reviewed by:	ed
Approved by:	sjg (mentor)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D9652

usr.bin/finger/finger.c

@@ -371,6 +371,7 @@ net:	for (p = nargv; *p;) {
 		    printf("\n");
 	}
 
+	free(nargv);
 	free(used);
 	if (entries == 0)
 		return;