Bleh, forgot to qref, still fixing bug 1037100. r=bustage

gfx/gl/SharedSurfaceGralloc.cpp

@@ -223,7 +223,7 @@ SharedSurface_Gralloc::Fence()
     if (gfxPrefs::GrallocFenceWithReadPixels()) {
         mGL->MakeCurrent();
         UniquePtr<char[]> buf = MakeUnique<char[]>(4);
-        mGL->fReadPixels(0, 0, 1, 1, LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, buf);
+        mGL->fReadPixels(0, 0, 1, 1, LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, buf.get());
     }
 }