Return fatal error to the upper layers when connection is lost while reading...

Return fatal error to the upper layers when connection is lost while reading the ICY metadata. Otherwise we will end up with an endless loop since -1 is interpreted by AStreamRefillStream() as a temporary error.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(cherry picked from commit 2a3e95d7b511fb627ac79a626068f4ba4271ad13)

modules/access/http.c

@@ -831,7 +831,7 @@ static ssize_t Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
             if( ReadICYMeta( p_access ) )
             {
                 p_access->info.b_eof = true;
-                return -1;
+                return 0;
             }
         }
         if( i_len > i_next )