Refactor NetBSD's ProcessTable_goThroughEntries().

[fraggerfox]

Simplify the ProcessTable_goThroughEntries() and also apply the fixes for the compiler warning.

netbsd/NetBSDProcessTable.c: In function 'NetBSDProcessTable_scanProcs':
netbsd/NetBSDProcessTable.c:185:53: warning: comparison is always true due to limited range of data type [-Wtype-limits]
          const char* name = ((int64_t)kproc->p_tdev != (int64_t)KERN_PROC_TTY_NODEV) ? devname(kproc->p_tdev, S_IFCHR): NULL;

The fix came in as part of the discussion here.

[fraggerfox]

Closed, since the commit was cherry picked into htop-dev#1360