allow range for partial flv response

src/http/modules/ngx_http_flv_module.c

diff --git a/src/http/modules/ngx_http_flv_module.c b/src/http/modules/ngx_http_flv_module.c
index 235ccdd..bed1b48 100644
--- a/src/http/modules/ngx_http_flv_module.c
+++ b/src/http/modules/ngx_http_flv_module.c
@@ -212,9 +212,6 @@
 
         out[0].buf = b;
         out[0].next = &out[1];
-
-    } else {
-        r->allow_ranges = 1;
     }
 
 
@@ -228,6 +225,8 @@
         return NGX_HTTP_INTERNAL_SERVER_ERROR;
     }
 
+    r->allow_ranges = 1;
+
     rc = ngx_http_send_header(r);
 
     if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {