#2987 Some divergent integrals give error, some don't

[Stavros Macrakis]

integrate(1/x,x,0,1) => defint: integral is divergent. (error)

But integrate(exp(x)/x,x,0,1) => noun form

Behavior should be consistent, and give an error for this case, too.

[Dan Gildea]

Fixed in commit [83de1b25f1751b389022e8af9c2076ebb19bb8b2]

check for divergent integral in same-sheet-subs