Killed Jam and empty .obj files

Hi,
     I'm wondering if anybody is having the same problem as
me.  When 
using a makefile project in VC, cancelling a build with
ctrl-break 
results in killing jam and its call to cl.exe in such a way
there's 
sometimes empty .obj files.  The solution I thought about is
to add in 
rules a call to something like "SHELL
myDeleteEmpty.exe $(objs)", but it 
slows down a bit the startup when building a large project. 
Has anyone 
met this kind of problem and what are your solutions?

Thx and regards,
Nicolas

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