From 385111bd86e0b38667879c3e89506ca1ae98e1df Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 12 Mar 2016 19:23:00 +0100
Subject: patch 7.4.1547 Problem:    Getting a cterm highlight attribute that
 is not set results in the             string "-1". Solution:   Return an
 empty string. (Taro Muraoka)

---
 src/syntax.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/syntax.c')

diff --git a/src/syntax.c b/src/syntax.c
index e37dacb8f..ac80ab4e7 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -8999,6 +8999,8 @@ highlight_color(
 	    n = HL_TABLE()[id - 1].sg_cterm_fg - 1;
 	else
 	    n = HL_TABLE()[id - 1].sg_cterm_bg - 1;
+	if (n < 0)
+	    return NULL;
 	sprintf((char *)name, "%d", n);
 	return name;
     }
-- 
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