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unsigned char by default compiler compatibility

Browse source 
http://ml.libwebsockets.org/pipermail/libwebsockets/2015-March/001705.html

Signed-off-by: Andy Green <andy.green@linaro.org>
This commit is contained in:
Andy Green 2015-03-30 18:56:52 +08:00
parent 87fb73cc65
commit 2a5774edca
1 changed files with 1 additions and 1 deletions
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2
lib/parsers.c
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@ -164,7 +164,7 @@ int lws_hdr_simple_create(struct libwebsocket *wsi,
return 0; return 0;
} }
static char char_to_hex(const char c) static signed char char_to_hex(const char c)
{ {
if (c >= '0' && c <= '9') if (c >= '0' && c <= '9')
return c - '0'; return c - '0';