tweak

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8029 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_ivr.c

@@ -572,7 +572,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_collect_digits_callback(switch_core_s
 	}
 
 	while (switch_channel_ready(channel)) {
-		switch_frame_t *read_frame;
+		switch_frame_t *read_frame = NULL;
 		switch_event_t *event;
 		switch_dtmf_t dtmf = {0};
 
@@ -617,7 +617,7 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_collect_digits_callback(switch_core_s
 			break;
 		}
 
-		if (args && (args->read_frame_callback)) {
+		if (read_frame && args && (args->read_frame_callback)) {
 			if (args->read_frame_callback(session, read_frame, args->user_data) != SWITCH_STATUS_SUCCESS) {
 				break;
 			}