From 8247dfc47577b87dc6348d58e346fd5a19659430 Mon Sep 17 00:00:00 2001
From: Dragos Oancea <dragos@signalwire.com>
Date: Fri, 31 Jan 2020 23:43:37 +0000
Subject: [PATCH] [core] scan-build: Dereference of null pointer (loaded from
 variable 'txt') - switch_img_write_text_img()

---
 src/switch_core_video.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/switch_core_video.c b/src/switch_core_video.c
index 5f6d4902ef..f7352bb0f9 100644
--- a/src/switch_core_video.c
+++ b/src/switch_core_video.c
@@ -2139,6 +2139,10 @@ SWITCH_DECLARE(switch_image_t *) switch_img_write_text_img(int w, int h, switch_
 	switch_image_t *txtimg = NULL;
 	int x = 0, y = 0;
 
+	if (!duptxt) {
+		return NULL;
+	}
+
 	if (strchr(text, ':')) {
 		argc = switch_split(duptxt, ':', argv);