Silence a warning in conditional expression.

Fixes a gcc warning caused by a typo. A redundant assignment operation was
accidentally used as the third operand of a conditional expression.
No functional change intended.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213061 91177308-0d34-0410-b5e6-96231b3b80d8