src/ltdl.cpp: fix compile failure against gcc4
src/ltdl.cpp: fix compile failure against gcc4

pushed back from the Debian distribution: http://bugs.debian.org/560486


svn commit r259

scim-im/scim,scim-im/scim,tzhuan/scim,tzhuan/scim,scim-im/scim,davispuh/scim,tzhuan/scim,tzhuan/scim,davispuh/scim,davispuh/scim,scim-im/scim,davispuh/scim