fix kernel module compilation for different build flags

closes #975

Change-Id: I21f7f10f99718ee88e688f0daf65011e8809df67
(cherry picked from commit e741a7434e)

kernel-module/xt_RTPENGINE.c

@@ -455,7 +455,7 @@ static struct re_auto_array streams;
 #  define PROC_POLL poll
 #else
 #  define PROC_OP_STRUCT proc_ops
-#  define PROC_OWNER 0,
+#  define PROC_OWNER
 #  define PROC_READ proc_read
 #  define PROC_WRITE proc_write
 #  define PROC_OPEN proc_open