lvm 0.9.1-beta1 still segfaults vgexport

[Todd M. Roy]

Andrea,
  Sorry to say but lvm 0.9.1-beta1 still segfaults
at the same place, line 140 of pv_read_all_pv_of_vg.c
pv_this is still null.
This with a straight 2.4.0 kernel with an onstream tape
patch and the generated lvm patch.  Lvm is a module (on
my home machine).

-- todd --
gdb /sbin/vgexport core:
...

#0  0x400427f3 in pv_read_all_pv_of_vg (vg_name=0xbffff794 "vg01PV_EXP", 
    pv=0xbffff710, reread=0) at pv_read_all_pv_of_vg.c:140
140	      for ( p = 0; pv_this[p] != NULL; p++) {
(gdb) print pv_this
$1 = (pv_v2_t **) 0x0
(gdb) bt
#0  0x400427f3 in pv_read_all_pv_of_vg (vg_name=0xbffff794 "vg01PV_EXP", 
    pv=0xbffff710, reread=0) at pv_read_all_pv_of_vg.c:140
#1  0x400487af in vg_read (vg_name=0xbffff794 "vg01PV_EXP",
vg=0xbffff750)
    at vg_read.c:61
#2  0x4004733d in vg_check_exist (vg_name=0xbffff794 "vg01PV_EXP")
    at vg_check_exist.c:54
#3  0x80491ee in main (argc=2, argv=0xbffff8cc) at vgexport.c:182
#4  0x4007b213 in __libc_start_main (main=0x8048d00 <main>, argc=2, 
    ubp_av=0xbffff8cc, init=0x80489c4 <_init>, fini=0x80495b4 <_fini>, 
    rtld_fini=0x4000d660 <_dl_fini>, stack_end=0xbffff8c4)
    at ../sysdeps/generic/libc-start.c:129
...
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