Removed extraneous check while processing request line.

src/http/ngx_http_request.c

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 47c62d9..210994b 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -987,7 +987,7 @@
                 return;
             }
 
-            if (r->host_start && r->host_end) {
+            if (r->host_end) {
 
                 host.len = r->host_end - r->host_start;
                 host.data = r->host_start;