Do not remove an empty note file after edit session

Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk>
Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>

src/ical.c

@@ -213,8 +213,10 @@ static void ical_export_note(FILE *stream, char *name)
 	int has_desc, has_prop, i;
 
 	asprintf(&note_file, "%s/%s", path_notes, name);
-	if (!(fp = fopen(note_file, "r")))
+	if (!(fp = fopen(note_file, "r")) || ungetc(getc(fp), fp) == EOF) {
+		fclose(fp);
 		return;
+	}
 	string_init(&note);
 	while (fgets(lbuf, BUFSIZ, fp))
 		string_catf(&note, "%s", lbuf);