ae.c: set errno when error is not a failing syscall.
ae.c: set errno when error is not a failing syscall.

In this way the caller is able to perform better error checking or to
use strerror() without the risk of meaningless error messages being
displayed.

Jonavin/redis,hanmichael/redis,enginekit/redis,shanegxxiao/redis,upsoft/redis,alpha8/redis,DeNA/redis,jacklee0810/redis,damy/redis,miminus/redis,daogangtang/redis_luajit2.6,kolonse/redis,quangnguyen90/redis,jacklee0810/redis,janeasystems/redis,miminus/redis,ideaar/redis,Jonavin/redis,enginekit/redis,sidsen/redis,jaambee/redis,enginekit/redis,jaambee/redis,oaastest/redis,janeasystems/redis,damy/redis,Jonavin/redis,ScottKaiGu/redis,shanegxxiao/redis,kts12345/redis,janeasystems/redis,daogangtang/redis_luajit2.6,damy/redis,miminus/redis,sidsen/redis,laurencee/redis,jaambee/redis,alpha8/redis,jaambee/redis,ideaar/redis,sidsen/redis,hanmichael/redis,DeNA/redis,damy/redis,Cybermaxs/redis,sidsen/redis,alpha8/redis,laurencee/redis,enginekit/redis,damy/redis,liqiang199105/redis,jqk6/redis,alpha8/redis,laurencee/redis,liqiang199105/redis,ideaar/redis,daogangtang/redis_luajit2.6,jqk6/redis,Jonavin/redis,liqiang199105/redis,janeasystems/redis,ScottKaiGu/redis,oaastest/redis,miminus/redis,nandhanurrevanth/redis,shanegxxiao/redis,liqiang199105/redis,ideaar/redis,sidsen/redis,nandhanurrevanth/redis,quangnguyen90/redis,DeNA/redis,miminus/redis,laurencee/redis,kts12345/redis,nandhanurrevanth/redis,Cybermaxs/redis,liqiang199105/redis,upsoft/redis,ScottKaiGu/redis,nandhanurrevanth/redis,upsoft/redis,oaastest/redis,Jonavin/redis,upsoft/redis,ScottKaiGu/redis,upsoft/redis,kts12345/redis,jqk6/redis,kolonse/redis,oaastest/redis,hanmichael/redis,janeasystems/redis,alpha8/redis,daogangtang/redis_luajit2.6,adamweixuan/redis,shanegxxiao/redis,jaambee/redis,adamweixuan/redis,oaastest/redis,nandhanurrevanth/redis,adamweixuan/redis,kolonse/redis,kolonse/redis,Cybermaxs/redis,ideaar/redis,Cybermaxs/redis,ScottKaiGu/redis,adamweixuan/redis,laurencee/redis,jqk6/redis,jacklee0810/redis,quangnguyen90/redis,kts12345/redis,jacklee0810/redis,jacklee0810/redis,Cybermaxs/redis,hanmichael/redis,enginekit/redis,kolonse/redis,quangnguyen90/redis,kts12345/redis,quangnguyen90/redis,sidsen/redis,shanegxxiao/redis,hanmichael/redis,adamweixuan/redis,jqk6/redis