[PATCH v5 1/3] color.c: fix color_parse_mem() with value_len == 0

[Nguyễn Thái Ngọc Duy]

In this code we want to match the word "reset". If len is zero,
strncasecmp() will return zero and we incorrectly assume it's "reset" as
a result.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 color.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/color.c b/color.c
index 81c2676..a9eadd1 100644
--- a/color.c
+++ b/color.c
@@ -207,6 +207,9 @@ int color_parse_mem(const char *value, int value_len, char 
*dst)
        struct color fg = { COLOR_UNSPECIFIED };
        struct color bg = { COLOR_UNSPECIFIED };
 
+       if (!len)
+               return -1;
+
        if (!strncasecmp(value, "reset", len)) {
                xsnprintf(dst, end - dst, GIT_COLOR_RESET);
                return 0;
-- 
2.8.2.524.g6ff3d78