_NAME_
getStopTimeStamp

_PROTOTYPE_
uint32 getStopTimeStamp(void *pStruct, char *structName);

_SHORT-DESCRIPTION_
Get a struct's stop time stamp (if it has one)

_DESCRIPTION_
getStopTimeStamp extracts the stop time stamp from the struct of type
structName. If there is no stop time stamp field in the struct, a zero is
returned. 

_INPUT_
* pStruct is a pointer (void *) to the beginning of a structure.
* structName is the full name of the struct type we are dealing with.

_OUTPUT_
* The stop time stamp associated with the structure,
* or zero if the struct type has no stop time field.