Fix gettimeofday compiler warning.  The second parameter should be NULL, the behavior of anything else is undefined.
Fix gettimeofday compiler warning.  The second parameter should be NULL, the behavior of anything else is undefined.

git-svn-id: 9e9401559e51101c165cdce4d49b411eb20436ed@4189 3d70eeeb-363e-0410-a505-8a46323a89f2

BRAINSia/teem,BRAINSia/teem,Slicer/teem,BRAINSia/teem,BRAINSia/teem,Slicer/teem,Slicer/teem,Slicer/teem,BRAINSia/teem,Slicer/teem