godoc: bring back "indexing in progress" message
godoc: bring back "indexing in progress" message

A wrongly nested if prevented the message from appearing.

Fixes issue 1420.

R=r, r2
CC=golang-dev
http://codereview.appspot.com/3987043

mhennings/marcohennings-go,npe9/noahevans-go9,sanjosh/sanjos100-tipc,d0f/go-zh,rdp/rogerpack2005-golang,Triskite/willstone-goclone,glycerine/jeaten-go-arrayof-structof,sanjosh/sanjos100-tipc,Triskite/willstone-goclone,webfd/go-zh,rflanagan/reginaldflanagan-project1,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,npe9/noahevans-go9,mhennings/marcohennings-go,Triskite/willstone-goclone,Triskite/willstone-goclone,webfd/go-zh,Triskite/willstone-goclone,d0f/go-zh,npe9/noahevans-go9,glycerine/jeaten-go-arrayof-structof,npe9/noahevans-go9,d0f/go-zh,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,d0f/go-zh,sanjosh/sanjos100-tipc,bryanxu/go-zh,Triskite/willstone-goclone,mhennings/marcohennings-go,npe9/noahevans-go9,mhennings/marcohennings-go,mhennings/marcohennings-go,rflanagan/reginaldflanagan-project1,rflanagan/reginaldflanagan-project1,rdp/rogerpack2005-golang,glycerine/jeaten-go-arrayof-structof,bryanxu/go-zh,webfd/go-zh,mhennings/marcohennings-go,sanjosh/sanjos100-tipc,webfd/go-zh,webfd/go-zh,sanjosh/sanjos100-tipc,rflanagan/reginaldflanagan-project1,mhennings/marcohennings-go,scirelli/scirelli-go,Triskite/willstone-goclone,rdp/rogerpack2005-golang,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,bryanxu/go-zh,rdp/rogerpack2005-golang,rdp/rogerpack2005-golang,bryanxu/go-zh,sanjosh/sanjos100-tipc,d0f/go-zh,bryanxu/go-zh,bryanxu/go-zh,d0f/go-zh,webfd/go-zh,rflanagan/reginaldflanagan-project1,sanjosh/sanjos100-tipc,scirelli/scirelli-go,glycerine/jeaten-go-arrayof-structof,glycerine/jeaten-go-arrayof-structof,scirelli/scirelli-go,rdp/rogerpack2005-golang,scirelli/scirelli-go,d0f/go-zh,webfd/go-zh,webfd/go-zh,scirelli/scirelli-go,rdp/rogerpack2005-golang,bryanxu/go-zh,bryanxu/go-zh,sanjosh/sanjos100-tipc,glycerine/jeaten-go-arrayof-structof,scirelli/scirelli-go,rdp/rogerpack2005-golang,npe9/noahevans-go9,d0f/go-zh,Triskite/willstone-goclone,scirelli/scirelli-go,rflanagan/reginaldflanagan-project1