Two LLVM 3.5 fixes

- Add forgotten prepare call. Fixes GiovineItalia/Gadfly.jl#368
- Remove an unused variable to silence compiler warning

src/cgutils.cpp

@@ -782,7 +782,7 @@ static void emit_typecheck(Value *x, jl_value_t *type, const std::string &msg,
  if ((jl_is_tuple(type) && type != (jl_value_t*)jl_tuple_type) ||
  !jl_is_leaf_type(type)) {
  istype = builder.
- CreateICmpNE(builder.CreateCall3(jlsubtype_func, x, literal_pointer_val(type),
+ CreateICmpNE(builder.CreateCall3(prepare_call(jlsubtype_func), x, literal_pointer_val(type),
  ConstantInt::get(T_int32,1)),
  ConstantInt::get(T_int32,0));
  }

src/debuginfo.cpp

@@ -399,7 +399,6 @@ void jl_getFunctionInfo(const char **name, int *line, const char **filename, siz
 // With MCJIT we can get function information directly from the ObjectFile
  std::map<size_t, ObjectInfo, revcomp> &objmap = jl_jit_events->getObjectMap();
  std::map<size_t, ObjectInfo, revcomp>::iterator it = objmap.lower_bound(pointer);
- llvm::object::ObjectFile *Obj = it->second.object;
 
  if (it == objmap.end())
  return jl_getDylibFunctionInfo(name,line,filename,pointer,skipC);