Gracefully handle all day events in iCal imports

Do not create two events when importing an event that lasts an entire
day.

Reported-by: Jörn Tillmanns <tillmanns@tuxzone.org>
Reported-by: Håkan Jerning <jerning@home.se>
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

test/data/ical-005.ical

@@ -0,0 +1,23 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+BEGIN:VEVENT
+SUMMARY:All day
+DTSTART;VALUE=DATE:20131003
+DTEND;VALUE=DATE:20131004
+END:VEVENT
+BEGIN:VEVENT
+SUMMARY:Two days
+DTSTART;VALUE=DATE:20131003
+DTEND;VALUE=DATE:20131005
+END:VEVENT
+BEGIN:VEVENT
+SUMMARY:On day 1
+DTSTART;VALUE=DATE:20131003
+DTEND;VALUE=DATE:20131004
+TRANSP:TRANSPARENT
+END:VEVENT
+BEGIN:VEVENT
+SUMMARY:On day 2
+DTSTART;VALUE=DATE:20131003
+END:VEVENT
+END:VCALENDAR

test/ical-005.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+. "${TEST_INIT:-./test-init.sh}"
+
+if [ "$1" = 'actual' ]; then
+  mkdir .calcurse || exit 1
+  cp "$DATA_DIR/conf" .calcurse || exit 1
+  "$CALCURSE" -D "$PWD/.calcurse" -i "$DATA_DIR/ical-005.ical"
+  "$CALCURSE" -D "$PWD/.calcurse" -s10/03/2013 -r3
+  rm -rf .calcurse || exit 1
+elif [ "$1" = 'expected' ]; then
+  cat <<EOD
+Import process report: 0030 lines read
+0 apps / 4 events / 0 todos / 0 skipped
+10/03/13:
+ * Two days
+ * All day
+ * On day 1
+ * On day 2
+
+10/04/13:
+ * Two days
+EOD
+else
+  ./run-test "$0"
+fi