Description of problem:
Synce does not build on x86_64. See build log: 
http://fedoraproject.org/extras/3/build-logs/x86_64/synce.log

Relevant part:
make[4]: Entering directory
`/rpmbuild/extras/cvs/rpms/synce/devel/synce-0.9.0/synce-librapi2-0.9.0/src'
if /bin/sh ../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I..  
-I/rpmbuild/extras/cvs/rpms/synce/devel/synce-0.9.0/synce-libsynce-0.9.0/lib -g
-Wall -Wsign-compare -Wno-long-long -Werror -ansi -O2 -g -pipe -m64  -Isupport
-O2 -g -pipe -m64 -MT database.lo -MD -MP -MF ".deps/database.Tpo" -c -o
database.lo database.c; \
then mv -f ".deps/database.Tpo" ".deps/database.Plo"; else rm -f
".deps/database.Tpo"; exit 1; fi
mkdir .libs
 gcc -DHAVE_CONFIG_H -I. -I. -I..
-I/rpmbuild/extras/cvs/rpms/synce/devel/synce-0.9.0/synce-libsynce-0.9.0/lib -g
-Wall -Wsign-compare -Wno-long-long -Werror -ansi -O2 -g -pipe -m64 -Isupport
-O2 -g -pipe -m64 -MT database.lo -MD -MP -MF .deps/database.Tpo -c database.c 
-fPIC -DPIC -o .libs/database.o
database.c: In function `CeReadRecordProps':
database.c:371: warning: cast from pointer to integer of different size
database.c:378: warning: cast from pointer to integer of different size
database.c: In function `PreparePropValForWriting':
database.c:414: warning: cast to pointer from integer of different size
database.c:443: warning: cast to pointer from integer of different size
make[4]: *** [database.lo] Error 1

Version-Release number of selected component (if applicable):
synce-0.9.0

How reproducible:
Always

Additional info:
The problem lies in 
http://cvs.sourceforge.net/viewcvs.py/synce/librapi2/src/database.c?rev=1.12&view=markup
The problematic part it already marked with the comments:
/* XXX: we can get problems here on 64-bit platforms */
[...]
/* TODO: convert endians on other data types! */

Does anyone whant to fix it? My programming skills are not good enough to do it
myself :-( 

Otherwise is suggest we set "ExcludeArch: x86_64" for now (maybe ppc64 also
while at it?)