Bug 806239 - When we dump memory reports after minimizing memory usage, we shouldn't also dump the reports before minimizing. r=njn

xpcom/base/MemoryInfoDumper.cpp

@@ -324,6 +324,7 @@ MemoryInfoDumper::DumpMemoryReportsToFile(
       do_GetService("@mozilla.org/memory-reporter-manager;1");
     NS_ENSURE_TRUE(mgr,);
     mgr->MinimizeMemoryUsage(callback);
+    return;
   }
 
   DumpMemoryReportsToFileImpl(identifier);