change mod!... to match zero or more frames

_From [bruen...@google.com](https://code.google.com/u/109494838902877177630/) on March 23, 2012 13:50:57_

mod!... is more flexible when it matches zero or more frames, as one or more can be constructed by adding mod!*.

however:

I just used two suppressions, one with one without
I've written suppressions to rely on one or more

so if we change it we should update our own suppressions

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=846_