Limit issue - replacing x with 1/x

[홍찬표]

Limit[Sin[x]/x,x->0] is "1". (It works well.)

Limit[x*Sin[1/x],x->Infinity] should also be "1" but "Indeterminate".

2nd expression is just the replacement of 1st expression. (x -> 1/x)

[Axel Kramer]

Fix #31

→ <<cset 41e0f3d94b88>>