[ptx] compile error on Fedora Core 4

[Petr Fischer]

Hi, I downloaded Hugin 0.5 RC1 and got this error:

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...
...
...
NonaStitcherPanel.o(.text+0xb1f): In function 
`NonaStitcherPanel::Stitch(PT::Panorama const&, PT::PanoramaOptions 
const&)':
../../src/include/common/utils.h:312: undefined reference to `vtable for 
utils::MultiProgressDisplay'
NonaStitcherPanel.o(.text+0x13c9):../../src/include/common/utils.h:315: 
undefined reference to `vtable for utils::MultiProgressDisplay'
NonaStitcherPanel.o(.text+0x1fcc):../../src/include/common/utils.h:315: 
more undefined references to `vtable for utils::MultiProgressDisplay' follow
./.libs/libhuginwxutils.a(MyProgressDialog.o)(.gnu.linkonce.r._ZTI16MyProgressDialog[typeinfo 
for MyProgressDialog]+0x18): undefined reference to `typeinfo for 
utils::MultiProgressDisplay'
./.libs/libhuginwxutils.a(MyProgressDialog.o)(.gnu.linkonce.t._ZN17OptProgressDialogD1Ev[OptProgressDialog::~OptProgressDialog()]+0x24): 
In function `OptProgressDialog::~OptProgressDialog()':
../../src/include/common/utils.h:315: undefined reference to `vtable for 
utils::MultiProgressDisplay'
./.libs/libhuginwxutils.a(MyProgressDialog.o)(.gnu.linkonce.t._ZN16MyProgressDialogD1Ev[MyProgressDialog::~MyProgressDialog()]+0x24): 
In function `MyProgressDialog::~MyProgressDialog()':
../../src/include/common/utils.h:315: undefined reference to `vtable for 
utils::MultiProgressDisplay'
./.libs/libhuginwxutils.a(MyProgressDialog.o)(.gnu.linkonce.t._ZN16MyProgressDialogD0Ev[MyProgressDialog::~MyProgressDialog()]+0x24): 
In function `MyProgressDialog::~MyProgressDialog()':
../../src/include/common/utils.h:315: undefined reference to `vtable for 
utils::MultiProgressDisplay'
./.libs/libhuginwxutils.a(MyProgressDialog.o)(.gnu.linkonce.t._ZN17OptProgressDialogD0Ev[OptProgressDialog::~OptProgressDialog()]+0x24): 
In function `OptProgressDialog::~OptProgressDialog()':
../../src/include/common/utils.h:315: undefined reference to `vtable for 
utils::MultiProgressDisplay'
collect2: ld returned 1 exit status
make[3]: *** [hugin] Error 1
make[3]: Leaving directory `/home/pf/src/hugin-0.5/src/hugin'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/pf/src/hugin-0.5/src/hugin'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/pf/src/hugin-0.5/src'
make: *** [all-recursive] Error 1
-------------------------------------------

wxGTK2-2.4.2
wxGTK-xrc-2.4.2
libpano12-2.7.0.9

What's wrong? Thanks, pf