[NO ISSUE][FUN][COMP] fix ifnan(), ifnanorinf(), ifinf() - user model changes: no - storage format changes: no - interface changes: no
Details: This patch is to fix the mentioned functions. The fix is to make ifnan() & ifnanorinf() skip the argument being inspected if it's a missing value and check the next one. For ifinf(), it should return missing if the argument being inspected is a missing value. Also, number of args is checked now.