Fixed bug in incorrect export of features.
Fixed bug in incorrect export of features.

CVML/vlbenchmarks,vlfeat/vlbenchmarks,CVML/vlbenchmarks,andersbll/vlbenchmarks,andersbll/vlbenchmarks,andersbll/vlbenchmarks,CVML/vlbenchmarks,vlfeat/vlbenchmarks,andersbll/vlbenchmarks,vlfeat/vlbenchmarks