another fix on parsing invalid dates

appointment-import/src/main/java/smash/appointment/parse/SubjectParser.java

@@ -219,7 +219,7 @@ public abstract class SubjectParser {
 			String tmp[] = result.split("/");
 			result = tmp[2] + "-" + tmp[1] + "-" + tmp[0];
 		}
-		if (result.charAt(2) == '-') {
+		if (result.length() == 10 && result.charAt(2) == '-') {
 			String tmp[] = result.split("-");
 			result = tmp[2] + "-" + tmp[1] + "-" + tmp[0];
 		}