Format git dirty even if there is no dirty files

Fixes a part of #131

modules/git/functions/git-info

@@ -376,10 +376,8 @@ function git-info {
   fi
 
   # Format dirty.
-  if (( $dirty > 0 )); then
   zstyle -s ':omz:module:git' dirty 'dirty_format'
   zformat -f dirty_formatted "$dirty_format" "D:$dirty"
-  fi
 
   # Format info.
   zstyle -a ':omz:module:git' info 'info_formats'