Fix infinite loop with zero-length options. #745
Merged
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The bundled copy of GYP enters an infinite loop when it encounters a
zero-length option so ensure those don't get through.
The root cause is a bad guard in gyp/pylib/gyp/input.py that doesn't
take into account that
'' in 'whatever'
evaluates to True.Fixes: #744
R=@rvagg