Utils exit_note does not close socket file descriptor of 0

[SamHerts]

Bug:

If socket call on line 133 returns socketfd == 0

Spindle/src/utils/exitnote.c

Line 133 in 585dacf

sockfd = socket(AF_UNIX, SOCK_STREAM, 0);

socketfd will not get properly closed:

Spindle/src/utils/exitnote.c

Lines 184 to 185 in 585dacf

	if (sockfd)
	close(sockfd);

Fix:

if (sockfd != -1) 
    close(sockfd);