prevent obscure divide by zero code path

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15413 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_voicemail/mod_voicemail.c

@@ -1158,7 +1158,7 @@ static switch_status_t create_file(switch_core_session_t *session, vm_profile_t
 			got_file = 1;
 		}
 
-		if (limit && (*message_len = fh.samples_out / fh.samplerate) < profile->min_record_len) {
+		if (limit && (*message_len = fh.samples_out / fh.samplerate ? fh.samplerate : 8000) < profile->min_record_len) {
 			if (unlink(file_path) != 0) {
 				switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Failed to delete file [%s]\n", file_path);
 			}

src/switch_core_file.c

@@ -52,6 +52,12 @@ SWITCH_DECLARE(switch_status_t) switch_core_perform_file_open(const char *file,
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Handle already open\n");
 		return SWITCH_STATUS_FALSE;
 	}
+	
+	if (!fh->samplerate) {
+		if (!(fh->samplerate = rate)) {
+			fh->samplerate = 8000;
+		}
+	}
 
 	if (zstr(file_path)) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid Filename\n");
@@ -135,12 +141,6 @@ SWITCH_DECLARE(switch_status_t) switch_core_perform_file_open(const char *file,
 		fh->handler = switch_core_strdup(fh->memory_pool, rhs);
 	}
 
-	if (!fh->samplerate) {
-		if (!(fh->samplerate = rate)) {
-			fh->samplerate = 8000;
-		}
-	}
-
 	if (channels) {
 		fh->channels = channels;
 	} else {