[OB] Fix syntax error in record_resume

[Stan Shebs]

Hui Zhu wrote:
> 	* record.c (record_resume): Change "siggnal" to "signal".
>   
FYI, a number of places in the code use "siggnal" for the variable name, 
or some other name that is not "signal".  Once upon a time some hosts 
did nasty macro tricks with "signal" in their system headers, so it was 
better for portability to use some other string.  I don't know if this 
is still an issue though.

Stan