included unistd.h header to fix the make error

graspit-simulator / graspit

The GraspIt! simulator

http://graspit-simulator.github.io/

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Closed BoyuanChen closed 7 years ago

BoyuanChen commented 7 years ago

included unistd.h header to fix the make error

jvarley commented 7 years ago

LGTM tested on 16.04 and 14.04.