fix inverted test in HashInfo generation
fix inverted test in HashInfo generation

A test to check if HashInfo generation is needed or not wasn't not
properly negated, which means we were generating HashInfo files
in cases when it was not needed (eg non-hash72 iOS devices).

hyperair/libgpod,neuschaefer/libgpod,hyperair/libgpod,neuschaefer/libgpod,neuschaefer/libgpod,neuschaefer/libgpod,neuschaefer/libgpod,hyperair/libgpod,hyperair/libgpod,hyperair/libgpod