Apply modernize-use-default to clang.

Summary: Replace empty bodies of default constructors and destructors with '= default'.

Reviewers: bkramer, klimek

Subscribers: klimek, alexfh, cfe-commits

Differential Revision: http://reviews.llvm.org/D13890

llvm-svn: 250822
diff --git a/clang/lib/Analysis/FormatString.cpp b/clang/lib/Analysis/FormatString.cpp
index 0948bc0..f8bbafd 100644
--- a/clang/lib/Analysis/FormatString.cpp
+++ b/clang/lib/Analysis/FormatString.cpp
@@ -26,7 +26,7 @@
 using namespace clang;
 
 // Key function to FormatStringHandler.
-FormatStringHandler::~FormatStringHandler() {}
+FormatStringHandler::~FormatStringHandler() = default;
 
 //===----------------------------------------------------------------------===//
 // Functions for parsing format strings components in both printf and