goto STOP if ridx==0
Merge pull request #2169 from takeru/load_crash

goto STOP if ridx==0
Update time.c

miss __MINGW32__ macro check
Merge pull request #2170 from windwiny/patch-1

Update time.c
Refactor rshift
Merge pull request #2172 from suzukaze/refactor-numeric.c

Refactor rshift