Make helper functions static. NFC.

llvm-svn: 236315
diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
index ed5da43..0c0c60f 100644
--- a/clang/lib/Sema/SemaStmt.cpp
+++ b/clang/lib/Sema/SemaStmt.cpp
@@ -3410,6 +3410,7 @@
   return new (Context) ObjCAutoreleasePoolStmt(AtLoc, Body);
 }
 
+namespace {
 class CatchHandlerType {
   QualType QT;
   unsigned IsPointer : 1;
@@ -3451,6 +3452,7 @@
     return LHS.QT == RHS.QT;
   }
 };
+} // namespace
 
 namespace llvm {
 template <> struct DenseMapInfo<CatchHandlerType> {