Silence a warning.

llvm-svn: 149155
diff --git a/libcxxabi/test/test_aux_runtime.cpp b/libcxxabi/test/test_aux_runtime.cpp
index 0d239b4..5506ee33 100644
--- a/libcxxabi/test/test_aux_runtime.cpp
+++ b/libcxxabi/test/test_aux_runtime.cpp
@@ -26,7 +26,7 @@
     class B { virtual void g() {}}; 
     
     B *bp = NULL;
-    try { typeid(*bp) == typeid (A); }
+    try {bool b = typeid(*bp) == typeid (A); }
     catch ( const std::bad_typeid &bc ) { return true; }
     return false;
     }