Comment 2 for bug 917606

StacktraceTop:
 dee_sequence_model_free_row (self=<optimized out>, iter=0x8cce080) at dee-sequence-model.c:981
 dee_sequence_model_remove (self=0x8ca4a20, iter_=0x8cce080) at dee-sequence-model.c:482
 dee_model_remove (self=0x8ca4a20, iter=0x8cce080) at dee-model.c:1126
 dee_proxy_model_remove (self=0x8b9c580, iter=0x8cce080) at dee-proxy-model.c:522
 dee_model_remove (self=0x8b9c580, iter=0x8cce080) at dee-model.c:1126