Fix build on ARM.
Fix build on ARM.

svn path=/trunk/libdom/; revision=13565

dunkelstern/libdom,Achal-Aggarwal/libdom,dunkelstern/libdom,Achal-Aggarwal/libdom,Achal-Aggarwal/libdom,prepare/netsurf_libdom,dunkelstern/libdom,dunkelstern/libdom,Achal-Aggarwal/libdom,prepare/netsurf_libdom,prepare/netsurf_libdom,prepare/netsurf_libdom,Achal-Aggarwal/libdom,dunkelstern/libdom,Achal-Aggarwal/libdom,prepare/netsurf_libdom,prepare/netsurf_libdom,dunkelstern/libdom