From b3114027f38cd9ae9df3c536f1a7648d6c715058 Mon Sep 17 00:00:00 2001
From: Margaret Matocha <ksmatocha@gmail.com>
Date: Wed, 8 Jul 2020 22:23:33 -0500
Subject: [PATCH] Check for zero width/height glyphs

---
 adafruit_display_text/label.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/adafruit_display_text/label.py b/adafruit_display_text/label.py
index c7d3809..05aef0e 100755
--- a/adafruit_display_text/label.py
+++ b/adafruit_display_text/label.py
@@ -261,7 +261,7 @@ def _update_text(
                 not self._text
                 or old_c >= len(self._text)
                 or character != self._text[old_c]
-            ):
+            ) and (glyph.width > 0 and glyph.height > 0):
                 try:
                     # pylint: disable=unexpected-keyword-arg
                     face = displayio.TileGrid(