Added missing close brace to OpaquePtr Visual Studio visualizer

This syntax error resulted in garbage being appended to OpaquePtr visualizations

llvm-svn: 272441
diff --git a/clang/utils/ClangVisualizers/clang.natvis b/clang/utils/ClangVisualizers/clang.natvis
index 89ebc44..72ecc6a 100644
--- a/clang/utils/ClangVisualizers/clang.natvis
+++ b/clang/utils/ClangVisualizers/clang.natvis
@@ -452,7 +452,7 @@
     </Expand>

   </Type>

   <Type Name="clang::OpaquePtr&lt;*&gt;">

-    <DisplayString>{($T1 *)Ptr</DisplayString>

+    <DisplayString>{($T1 *)Ptr}</DisplayString>

     <Expand>

       <ExpandedItem>($T1 *)Ptr</ExpandedItem>

     </Expand>