Fix potential double-free.

llvm-svn: 51381
diff --git a/clang/lib/AST/Stmt.cpp b/clang/lib/AST/Stmt.cpp
index b12518f..6d8ebcf 100644
--- a/clang/lib/AST/Stmt.cpp
+++ b/clang/lib/AST/Stmt.cpp
@@ -57,7 +57,7 @@
 
 void DeclStmt::Destroy(ASTContext& C) {
   TheDecl->Destroy(C);
-  Stmt::Destroy(C);
+  delete this;
 }
 
 void Stmt::PrintStats() {