Reduce initial Sema memory consumption by 400KB. By Elisavet Sakellari.

llvm-svn: 259637
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index f61d959..b219e92 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -123,7 +123,7 @@
           CancelRegion(false), AssociatedLoops(1), InnerTeamsRegionLoc() {}
   };
 
-  typedef SmallVector<SharingMapTy, 64> StackTy;
+  typedef SmallVector<SharingMapTy, 4> StackTy;
 
   /// \brief Stack of used declaration and their data-sharing attributes.
   StackTy Stack;