Problem installing gift-0.1.14 (as well)

Invalid covariant return type.

  g++ -DHAVE_CONFIG_H -I. -I. -I../.. -DHAS_BOOL -DLINK_DYNAMICALLY 
-I../.. -g -O2 -DEF_PROTECT_BELOW=1 -DEF_PROTECT_FREE 
-DEF_PROTECT_ALIGNMENT=8 -DEF_FILL=42 -I /usr/include/mysql 
-D__GIFT_WITH_PERL__ -fno-strict-aliasing -pipe -D_LARGEFILE_SOURCE 
-D_FILE_OFFSET_BITS=64 -I/usr/lib/perl5/5.8.7/i686-linux/CORE -MT 
CAccessorFactoryContainer.lo -MD -MP -MF 
.deps/CAccessorFactoryContainer.Tpo -c CAccessorFactoryContainer.cc  
-fPIC -DPIC -o .libs/CAccessorFactoryContainer.o
In file included from ../../libGIFTAcPerl/include/CAFPerl.h:31,
                  from CAccessorFactoryContainer.cc:36:
../../libGIFTAcPerl/include/CAcPerl.h:125: error: invalid covariant 
return type for `virtual std::pair<bool, long int> 
CAcPerl::URLToID(const std::string&) const'
../../libMRML/include/CAccessor.h:90: error:   overriding `virtual 
std::pair<bool, TID> CAccessor::URLToID(const std::string&) const'
make[3]: *** [CAccessorFactoryContainer.lo] Error 1
make[3]: Leaving directory `/home/ldx/tmp/gift-0.1.14/libMRML/cc'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/ldx/tmp/gift-0.1.14/libMRML'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/ldx/tmp/gift-0.1.14'
make: *** [all] Error 2

Wolfgang, you send Derek a 'fixed' version 0f 0.1.14 on 20 may. Could 
you please send me one as well?

Cheers,

Michiel Roos