ss: fix end-of-line printing in misc/ss.c

The previous change to ss to show header broke the printing of
end-of-line for the last entry.

Tested:

diff <(./ss.old -nltp) <(misc/ss -nltp)
38c38
< LISTEN   0  128   [::1]:35417  [::]:*  users:(("foo",pid=65254,fd=116))
\ No newline at end of file

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

misc/ss.c

@@ -1290,6 +1290,11 @@ static void render(void)
 
 		token = buf_token_next(token);
 	}
+	/* Deal with final end-of-line when the last non-empty field printed
+	 * is not the last field.
+	 */
+	if (line_started)
+		printf("\n");
 
 	buf_free_all();
 	current_field = columns;