build failed on ubuntu 13.04

```
alert.cpp:268:1: fatal error: opening dependency file obj/alert.d: No such file or directory
compilation terminated.
make: *** [obj/alert.o] Error 1
```

ubuntu 13.04

```
installted packages:

libboost-all-dev
libqtgui4
libminiupnpc-dev
libboost1.49-all-dev
```
