Remove a nonsensical bit of code from...

Remove a nonsensical bit of code from InitListChecker::getStructuredSubobjectInit which was increasing the reserved size for an init list past its maximum possible size. Fixes PR11056, a case where we were reserving a bunch of memory for arrays that was never actually used.

(No testcase because I don't think we have any way to actually write a testcase for this; the chosen value of NumElements has no effects on anything other than performance and memory usage.)

llvm-svn: 141106