WIP -- trans -- workaround valgrind cleanup failure

Author: nikomatsakis

src/librustc_trans/trans/base.rs

@@ -958,7 +958,7 @@ pub fn trans_external_path<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>,
 
 pub fn invoke<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
                           llfn: ValueRef,
-                          llargs: Vec<ValueRef> ,
+                          llargs: &[ValueRef],
                           fn_ty: Ty<'tcx>,
                           call_info: Option<NodeInfo>,
                           // FIXME(15064) is_lang_item is a horrible hack, please remove it

src/librustc_trans/trans/callee.rs

@@ -826,7 +826,7 @@ pub fn trans_call_inner<'a, 'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
         // Invoke the actual rust fn and update bcx/llresult.
         let (llret, b) = base::invoke(bcx,
                                       llfn,
-                                      llargs,
+                                      llargs[],
                                       callee_ty,
                                       call_info,
                                       dest.is_none());

src/librustc_trans/trans/glue.rs

@@ -291,7 +291,7 @@ fn trans_struct_drop<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
         let dtor_ty = ty::mk_ctor_fn(bcx.tcx(),
                                      &[get_drop_glue_type(bcx.ccx(), t)],
                                      ty::mk_nil(bcx.tcx()));
-        let (_, variant_cx) = invoke(variant_cx, dtor_addr, args, dtor_ty, None, false);
+        let (_, variant_cx) = invoke(variant_cx, dtor_addr, args[], dtor_ty, None, false);
 
         variant_cx.fcx.pop_and_trans_custom_cleanup_scope(variant_cx, field_scope);
         variant_cx