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_sections_misc_messages.c b/clang/test/OpenMP/parallel_sections_misc_messages.c
index a202187..203d12c 100644
--- a/clang/test/OpenMP/parallel_sections_misc_messages.c
+++ b/clang/test/OpenMP/parallel_sections_misc_messages.c
@@ -115,12 +115,12 @@
     foo();
   }
 // expected-error@+2 {{expected ')'}} expected-note@+2 {{to match this '('}}
-// expected-error@+1 {{expected expression}}
+// expected-error@+1 2 {{expected expression}}
 #pragma omp parallel sections private(,
   {
     foo();
   }
-// expected-error@+1 {{expected expression}}
+// expected-error@+1 2 {{expected expression}}
 #pragma omp parallel sections private(, )
   {
     foo();
@@ -166,12 +166,12 @@
   }
 
 // expected-error@+2 {{expected ')'}} expected-note@+2 {{to match this '('}}
-// expected-error@+1 {{expected expression}}
+// expected-error@+1 2 {{expected expression}}
 #pragma omp parallel sections lastprivate(,
   {
     foo();
   }
-// expected-error@+1 {{expected expression}}
+// expected-error@+1 2 {{expected expression}}
 #pragma omp parallel sections lastprivate(, )
   {
     foo();
@@ -217,12 +217,12 @@
   }
 
 // expected-error@+2 {{expected ')'}} expected-note@+2 {{to match this '('}}
-// expected-error@+1 {{expected expression}}
+// expected-error@+1 2 {{expected expression}}
 #pragma omp parallel sections firstprivate(,
   {
     foo();
   }
-// expected-error@+1 {{expected expression}}
+// expected-error@+1 2 {{expected expression}}
 #pragma omp parallel sections firstprivate(, )
   {
     foo();