Define special case for convertTo<uint8_t>() and convertTo<int8_t>()
Define special case for convertTo<uint8_t>() and convertTo<int8_t>()

The generic version was converting uint8 as it was a character
(uint8_t is an alias to unsigned char on most compiler).
Thus converting "1" would return 49 ie '1'.

As convertTo is thought as an _numerical_ conversion tool
(contrary to boost::lexical_cast for example),
forbid considering the input as a character and consider uint8_t
(aka unsigned char) as a number exclusively

Same for int8_t.

Signed-off-by: Kevin Rocard <f6672397850e914591889d29dcaf9077eb1a8a4f@intel.com>
Signed-off-by: David Wagner <60228a510f9a76940848fa2d29321fc4edfc2119@intel.com>

krocard/parameter-framework,01org/parameter-framework,01org/parameter-framework,krocard/parameter-framework,clero/parameter-framework,miguelgaio/parameter-framework,miguelgaio/parameter-framework,clero/parameter-framework,krocard/parameter-framework,dawagner/parameter-framework,dawagner/parameter-framework,miguelgaio/parameter-framework,clero/parameter-framework,mgaio/parameter-framework,mgaio/parameter-framework,mgaio/parameter-framework,dawagner/parameter-framework,01org/parameter-framework