Sema: Use getParameterType() instead of getOldType() in CSRanking.cpp

One last usage of getOldType() remains here, but it's actually
meaningful since we want to handle InOutType there, so it will
take more work to eliminate.

Author: slavapestov

lib/Sema/CSRanking.cpp

@@ -627,8 +627,8 @@ bool CompareDeclSpecializationRequest::evaluate(
     // If they both have trailing closures, compare those separately.
     bool compareTrailingClosureParamsSeparately = false;
     if (numParams1 > 0 && numParams2 > 0 &&
-        params1.back().getOldType()->is<AnyFunctionType>() &&
-        params2.back().getOldType()->is<AnyFunctionType>()) {
+        params1.back().getParameterType()->is<AnyFunctionType>() &&
+        params2.back().getParameterType()->is<AnyFunctionType>()) {
       compareTrailingClosureParamsSeparately = true;
     }
 
@@ -1132,8 +1132,8 @@ SolutionCompareResult ConstraintSystem::compareSolutions(
         auto params = fnTy->getParams();
         assert(params.size() == 2);
 
-        auto param1 = params[0].getOldType();
-        auto param2 = params[1].getOldType()->castTo<AnyFunctionType>();
+        auto param1 = params[0].getParameterType();
+        auto param2 = params[1].getParameterType()->castTo<AnyFunctionType>();
 
         assert(param1->getOptionalObjectType());
         assert(params[1].isAutoClosure());