[PATCH] Fix assertion failure when a member is given an address space.

[Joey Gouly]

  I believe this is wrong for OpenCL:
  `6.3.o. Elements of a struct or union must belong to the same address space. Declaring a struct or union whose elements are in different address spaces is illegal`

  Although, I'm not sure if anyone actually uses this..

http://llvm-reviews.chandlerc.com/D444