[OPNEMP]Allow grainsize clause in combined task-based directives.

The expression of the grainsize clause must be captured in the combined
task-based directives, like 'parallel master taskloop' directive.

llvm-svn: 374810
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 55f2be3..0a7958f 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -12934,6 +12934,7 @@
 }
 
 void OMPClauseReader::VisitOMPGrainsizeClause(OMPGrainsizeClause *C) {
+  VisitOMPClauseWithPreInit(C);
   C->setGrainsize(Record.readSubExpr());
   C->setLParenLoc(Record.readSourceLocation());
 }