Fix issue with invalid flat operand number

Avoid iterating over list of operands beyond the number of operands in it.

PS: this fixes issue with revision #167634.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167635 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed