[Serdev] xlog color patch

[Ingo Wolfsberger]

> 	You might want to increase COL_BUF or move it to allocating memory as 
> needed, 20 bytes doesn't seem large enough IMHO as 3 color entities 
> (with fore & background colors) in a xlog call would overflow the 
> variable (5 + (5*3) + 1 = 21). How does the xlog module with this patch 
> react to something like:
> 
>    xlog("L_ERR", 
> "%Csrtesting%Cybtesting%Cwstesting%Cswtesting%Cgrtesting%Crgtesting\n");
> 
> 	It's not likely to come up but you never know...

Hello Evan,

Only one ansi color string is written into the static char color[COL_BUF];
It is possible to use the color specifier more than one time, the additional
static char color[COL_BUF] are created.

Overflow should never happen.

bye,
  Ingo

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