Revert "[OPENMP] Allow skip expression after comma in clauses with lists."

This reverts commit http://reviews.llvm.org/rL265003. After some
thoughts decided to emit errors here.

llvm-svn: 265119
diff --git a/clang/test/OpenMP/parallel_firstprivate_messages.cpp b/clang/test/OpenMP/parallel_firstprivate_messages.cpp
index 1e06548..fc0eb4c 100644
--- a/clang/test/OpenMP/parallel_firstprivate_messages.cpp
+++ b/clang/test/OpenMP/parallel_firstprivate_messages.cpp
@@ -67,7 +67,7 @@
   #pragma omp parallel firstprivate ( // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   #pragma omp parallel firstprivate () // expected-error {{expected expression}}
   #pragma omp parallel firstprivate (argc // expected-error {{expected ')'}} expected-note {{to match this '('}}
-  #pragma omp parallel firstprivate (argc, // expected-error {{expected ')'}} expected-note {{to match this '('}}
+  #pragma omp parallel firstprivate (argc, // expected-error {{expected expression}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   #pragma omp parallel firstprivate (argc > 0 ? argv[1] : argv[2]) // expected-error {{expected variable name}}
   #pragma omp parallel firstprivate (argc)
   #pragma omp parallel firstprivate (S1) // expected-error {{'S1' does not refer to a value}}