If the type of the captured variable is a pointer(s) to variably
modified type, this type was not processed correctly. Need to drill into
the type, find the innermost variably modified array type and convert it
to canonical parameter type.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@299868 91177308-0d34-0410-b5e6-96231b3b80d8