Omit kutil_openlog if DEBUG not defined or 0

[Aaron Poffenberger]

I was getting errors when the LOGFILE was missing, or DEBUG was undefined or set to 0.

Might be worthwhile moving kutil_openlog down into the other #if statements along with a check for LOGFILE.

$OpenBSD$

Index: kcaldav.c
--- kcaldav.c.orig
+++ kcaldav.c
@@ -313,7 +313,9 @@ main(void)
        char            *np;
        size_t           i, sz;
 
+#if defined LOGFILE && defined DEBUG && DEBUG > 0
        kutil_openlog(LOGFILE);
+#endif
 
        st = NULL;
 #if defined DEBUG && DEBUG > 1