Fixed a bug on Mac OS #7
Fixed a bug on Mac OS #7

Thank you OMerry for your report !


Former-commit-id: 5c80e299e91fcdc2f9043fc6c62aa0a40ee8c609 [formerly 88287b08963662c8f298e3f486a924a000ca13ae]
Former-commit-id: b00ba709db08c8704fcd8b378ab7abd86bb1e994
tourdrone/cvdrone,tourdrone/cvdrone