xnest doesn't link for vax

[Kurt Schreiner <ks%ub.uni-mainz.de@localhost>]

Hi,

with -current source updated some minutes ago build.sh ... distribution
for vax (cross build on MacOSX) fails:

       link  xnest/Xnest
/u/NetBSD/arch/vax/obj/external/mit/xorg/server/xorg-server/dix/libdix.a(getevents.o):
 In function `CreateClassesChangedEvent':
getevents.c:(.text+0x622): undefined reference to `lroundf'
/u/NetBSD/arch/vax/obj/external/mit/xorg/server/xorg-server/dix/libdix.a(getevents.o):
 In function `GetPointerEvents':
getevents.c:(.text+0xc3b): undefined reference to `lround'
getevents.c:(.text+0xc4c): undefined reference to `lround'
/u/NetBSD/arch/vax/obj/external/mit/xorg/server/xorg-server/dix/libdix.a(ptrveloc.o):
 In function `acceleratePointerPredictable':
ptrveloc.c:(.text+0x822): undefined reference to `lrintf'
ptrveloc.c:(.text+0x84e): undefined reference to `lrintf'
collect2: ld returned 1 exit status

*** Failed target:  Xnest

Kurt