Reclaim memory allocated for ParmVarDecl's in FunctionDecl::Destroy.

Fixed a bug in ParmVarDecl::param_end(): Handle the case where there are no
ParmVarDecls for a FunctionDecl, but its function prototype has formal arguments
(can happen with typedefs).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51297 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed