Removed the feature test macros.
Removed the feature test macros.

On Mac OS X they disable the definition of the timeval macros and on 
Linux they are defined by default. Thus removing them makes everything 
work on both platforms.


josh-wambua/libdivecomputer,venkateshshukla/libdivecomputer,andysan/libdivecomputer,venkateshshukla/libdivecomputer,henrik242/libdivecomputer,glance-/libdivecomputer,andysan/libdivecomputer,josh-wambua/libdivecomputer,Poltsi/libdivecomputer-vms,glance-/libdivecomputer,henrik242/libdivecomputer