Fix infinite loop in Number#bit_length
Fix infinite loop in Number#bit_length

> 9007199254740991 >> 1
-1
> 9007199254740991 << 1
-2
> 9007199254740992 >> 1
0
> 9007199254740990 >> 1
-1
> 9007199254740989 >> 1
-2

kachick/opal,wied03/opal,jgaskins/opal,opal/opal,Mogztter/opal,kachick/opal,Mogztter/opal,iliabylich/opal,opal/opal,wied03/opal,iliabylich/opal,opal/opal,wied03/opal,Mogztter/opal,kachick/opal,jgaskins/opal,kachick/opal,jgaskins/opal,iliabylich/opal,Mogztter/opal,opal/opal