Avoid geo.c warning in initialization.
Avoid geo.c warning in initialization.

This problem was properly solved in 4.0 / unstable. Here is just a quick
fix for the warning.

xuguruogu/redis,xuguruogu/redis,xuguruogu/redis,pedigree/redis,xuguruogu/redis,pedigree/redis,pedigree/redis,pedigree/redis