Make sure to release the expressions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67027 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 37035b9..0123fe0 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -2258,6 +2258,8 @@
     }
   }
   
+  assertexpr.release();
+  assertmessageexpr.release();
   Decl *Decl = StaticAssertDecl::Create(Context, CurContext, AssertLoc, 
                                         AssertExpr, AssertMessage);