kevent64 shim turns time negative in absolute to relative conversion. Checked for it

Author: frankeh

src/shims/linux_stubs.c

@@ -158,11 +158,14 @@ int kevent64(int kq, /*const*/ struct kevent64_s *changelist, int nchanges, stru
 	     // into a relative. Consider fiddling with creating relative events instead (didn't work 
 	     // on first attempt). We also ignore the LEEWAY. Finally we must convert from 
              // NSECS to MSECS (might have to expand to deal with OTHER NOTE_xSECS flags
-             changelist->data -= time(NULL) * NSEC_PER_SEC;
-	     changelist->data /= 1000000;
+
+             changelist->data -= _dispatch_get_nanoseconds();
+             //changelist->data -= time(NULL) * NSEC_PER_SEC;
              dbg_kevent64("kevent64(%s,%x) data=%lx:%ld\n",
                           _evfiltstr(changelist->filter),changelist->fflags,
 			  changelist->data,changelist->data);
+	     changelist->data /= 1000000UL;
+	     if ((int64_t)(changelist->data) <= 0) changelist->data = 1; // for some reason time turns negative
          }
      }
 #endif