[mythtv] Compiler Warnings on OSX that may indicate problems

[David]

> 
> Below are the compiler warnings remaining on OSX...
> 
> The httprequest.cpp and bufferedsocketdevice.cpp appear to 
> indicate real problems, random data can be returned when an 
> object is missing. I didn't fix these in because I'm not sure 
> what should be returned when the object is missing.
> 
> The mpeg2fix.cpp problems look like the API was changed so 
> that a function returned false on an error but there are 
> still places where we check for a return value less than 0 
> for an error...
> 
> I think the rest of the warnings indicate some not yet 
> implemented code.
> 
> -- Daniel
> 

The httprequest.cpp issue should be fixed with changeset 12423.

The bufferedsocketdevice.cpp issue is just an unused variable
for some commented out code which should not be a problem. 

David.