Bug 723029 - Crash in mozilla::storage::Service::UpdateQutoaInformationForFile @ `anonymous namespace''::xOpen.

r=taras

storage/src/TelemetryVFS.cpp

@@ -323,6 +323,8 @@ xOpen(sqlite3_vfs* vfs, const char *zName, sqlite3_file* pFile,
   }
   p->histograms = h;
   rc = orig_vfs->xOpen(orig_vfs, zName, p->pReal, flags, pOutFlags);
+  if( rc != SQLITE_OK )
+    return rc;
   if( p->pReal->pMethods ){
     sqlite3_io_methods *pNew = new sqlite3_io_methods;
     const sqlite3_io_methods *pSub = p->pReal->pMethods;