xbps-repo/index.c: fix warnings found by clang.
xbps-repo/index.c: fix warnings found by clang.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20100428211333-wi7id42b9ol7g2ae

ebfe/xbps,stpx/xbps,stpx/xbps,datenwolf/xbps,stpx/xbps,ebfe/xbps,ebfe/xbps,datenwolf/xbps,datenwolf/xbps