Unified handling of ngx_create_temp_file() return value.
Unified handling of ngx_create_temp_file() return value.

The original check for NGX_AGAIN was surplus, since the function returns
only NGX_OK or NGX_ERROR.  Now it looks similar to other places.

No functional changes.

hy0kl/nginx,hy0kl/nginx,hy0kl/nginx