make SetHash160 return a value (as specified in the function signature)
Merge pull request #434 from laanwj/addkey_retval

make SetHash160 return a value (as specified in the function signature)
Namecoin: fix conflict
Merge commit 'a0eb1d151f60ac49ce30042c7ae4039cf538992d' into namecoin_merge_v0.8