FS-11559: check file name null ptr (crashfix CoreSession:recordFile)

src/switch_cpp.cpp

@@ -1278,6 +1278,7 @@ SWITCH_DECLARE(int) CoreSession::recordFile(char *file_name, int time_limit, int
 	this_check(-1);
 	sanity_check(-1);
 
+	if (!file_name) return 0;
 	memset(&local_fh, 0, sizeof(local_fh));
 	fhp = &local_fh;
 	local_fh.thresh = silence_threshold;

src/switch_ivr_play_say.c

@@ -390,6 +390,10 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_record_file(switch_core_session_t *se
 		return SWITCH_STATUS_FALSE;
 	}
 
+	if (!file) {
+		return SWITCH_STATUS_FALSE;
+	}
+
 	prefix = switch_channel_get_variable(channel, "sound_prefix");
 
 	if (!prefix) {