Prevent access to an uninitialized variable

The "-h" option may access an uninitialized value. Prevent it
by properly initializing the value.

CID:	1006559


git-svn-id: svn+ssh://svn.freebsd.org/base/head@277979 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f

bin/ps/ps.c

@@ -178,7 +178,7 @@ main(int argc, char *argv[])
 	KINFO *kinfo = NULL, *next_KINFO;
 	KINFO_STR *ks;
 	struct varent *vent;
-	struct winsize ws;
+	struct winsize ws = { .ws_row = 0 };
 	const char *nlistf, *memf, *fmtstr, *str;
 	char *cols;
 	int all, ch, elem, flag, _fmt, i, lineno, linelen, left;