Bug 665549 - Fix unused variable warning for 'shutdownObserved' in mozStorageService.cpp; r=sdwilsh

storage/src/mozStorageService.cpp

@@ -63,6 +63,7 @@
 #include "nsIMemoryReporter.h"
 
 #include "mozilla/FunctionTimer.h"
+#include "mozilla/Util.h"
 
 namespace {
 
@@ -293,7 +294,7 @@ Service::~Service()
   if (rc != SQLITE_OK)
     NS_WARNING("sqlite3 did not shutdown cleanly.");
 
-  bool shutdownObserved = !sXPConnect;
+  DebugOnly<bool> shutdownObserved = !sXPConnect;
   NS_ASSERTION(shutdownObserved, "Shutdown was not observed!");
 
   gService = nsnull;