HTTP/2: fixed HPACK header field parsing.

src/http/v2/ngx_http_v2.c

diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
index b8c4870..0da865f 100644
--- a/src/http/v2/ngx_http_v2.c
+++ b/src/http/v2/ngx_http_v2.c
@@ -1451,6 +1451,11 @@
 
     h2c->state.field_rest -= size;
 
+    if (h2c->state.field_rest) {
+        return ngx_http_v2_state_save(h2c, end, end,
+                                      ngx_http_v2_state_field_skip);
+    }
+
     return ngx_http_v2_state_process_header(h2c, pos + size, end);
 }